Mom-to-Be Ashley Tisdale Walks Her Dog in L.A., Plus Billy Porter, Jennifer Lopez and More

Mom-to-be Ashley Tisdale takes her dog for a walk in Los Angeles on Tuesday.

Billy Porter sports a big smile on Tuesday during rehearsals for ABC's Dick Clark's New Year's Rockin' Eve in New York City's Times Square.

Jennifer Lopez matches her mask to her ensemble on Tuesday in N.Y.C.

A bundled up Matt Smith takes his dog for a walk in London on Tuesday.

Big Sean gets ready for midnight with Tequila Don Julio at home in L.A. 

Mom-to-be Lala Kent shows off her baby bump during a Miami visit with fiancé Randall Emmett on Tuesday.

Olivia Palermo and her dressed-up dog are perfectly in step on Tuesday while walking in N.Y.C.

Alia Shawkat covers up for a coffee run on Tuesday in Los Feliz, California.

Katie Homes and boyfriend Emilio Vitolo Jr. have their eyes to the sky on Monday during an outing in N.Y.C.

Jennifer Lopez masks up while leaving a studio in New York City on Monday.

Pregnant Hilary Duff and husband Matthew Koma go for a grocery run at a Whole Foods in L.A. on Monday.

Model mom-to-be Elsa Hosk takes a walk in the rain in Los Angeles on Monday.

Pregnant Katharine McPhee and David Foster walk hand-in-hand in West Hollywood on Monday.

Ellen DeGeneres hops on her bike after lunching with friends in Santa Barbara, California, on Monday.

Newly engaged Tayshia Adams and Zac Clark do some shopping in New York City on Monday.

Kimora Lee Simmons and daughter Ming Lee kick back on the beach in St. Bart's over the weekend.

Kyle Richards is bundled up in yellow for a solo shopping trip in Aspen on Sunday.

Eiza Gonzalez flashes her abs while running into a Los Angeles Whole Foods on Sunday.

Rebel Wilson grabs some goodies from the grocery store in Los Feliz, California, on Sunday.

Jean-Claude Van Damme was spotted spending time with his family, including mom Eliana Van Varenbergh in St. Barts.

Jennifer Lopez and fiancé Alex Rodriguez went to the gym the day after Christmas in Miami.

Mindy Kaling was seen running errands in Los Angeles with a mask on.

Tom Brady and the Tampa Bay Buccaneers defeated the Detroit Lions in Detroit to advance to the NFL playoffs.

Kate Mara was dressed in casual wear as she enjoyed a day out in Los Angeles.

Hugh Jackman went swimming in the Hamptons water.

Bachelorette stars Tayshia Adams and Zac Clark spent Christmas Eve in New York City.

Conan O'Brien was out and about on Christmas Eve in Aspen, Colorado.

Prince Charles and Camilla, Duchess of Cornwall were all smiles in Birkhall, Scotland.

Jessica Alba leaves Bristol Farms after grocery shopping ahead of Christmas on Thursday in Beverly Hills.

Katharine McPhee goes last minute Christmas Eve shopping for her husband David Foster at Jhon Varvatos in West Hollywood on Thursday.

Caitlyn Jenner picks up holiday gifts from Polacheck's in Calabasas, California on Thursday.

Jamie Lee Curtis masks up for a solo stroll on Wednesday around her neighborhood in L.A. 

Chrissy Teigen and John Legend hold hands on a walk while celebrating the holidays in St-Barth on Wednesday.  

Kelly Brook shows off her personalized Christmas sweater as she arrives at Global Radio studios in London to record her Heart FM show.

Jennifer Lopez totes her signature sparkly tumbler to a workout in Miami on Wednesday.

New couple Shia LaBeouf and Margaret Qualley take a jog through Los Angeles together on Wednesday.

Colin Farrell makes a grocery run in Los Angeles on Tuesday.

Bella Hadid sports a colorful look for a New York City outing on Wednesday.

Justin Theroux and pup Kuma make some last-minute pre-holiday stops in N.Y.C. on Tuesday.

Chloe x Halle strike a post on Tuesday after performing live for Verizon Up members virtually from The Wiltern in Los Angeles.

Another day, another green juice for Bella Hadid, who matches her drink to her jacket in New York City on Tuesday.

Jordana Brewster and new love Mason Morfit walk hand-in-hand while out Tuesday in L.A.

Katie Holmes has her hands full while shopping in Soho on Tuesday in N.Y.C.

Shawn Mendes and Camila Cabello go for a stroll through Mendes' hometown of Pickering, Canada on Tuesday.

Kate Walsh hits the beach in an orange and pink bikini in Perth, Australia on Tuesday.

David Foster and pregnant wife Katharine McPhee take their puppy for a stroll on Monday in Beverly Hills. 

Irina Shayk shows off her street style in an olive green jumpsuit on Sunday in N.Y.C. 

T.I. spreads holiday cheer by gifting a student from Next Level Boys Academy clothes and shoes during Harris Community Works Holiday Caravan at DLTR on Monday in Atlanta.

Prince Jackson poses with a group of kids at the Heal L.A. event he hosted with Mattel to support underprivileged youths this Christmas in L.A. on Monday in El Segundo, California.

Kate Walsh steps out in rhinestone-edged sunglasses for an afternoon walk in Perth, Australia on Sunday.

Tori Kelly performs with Babyface at City National Grove of Anaheim on Monday in Anaheim, California. 

Joe Jonas and Sophie Turner stroll into town after hitting the slopes and enjoying the snow on Sunday in Mammoth Lakes, California.

Liam Hemsworth stocks up on food at a local grocery store in Byron Bay, Australia on Monday.

Bella Hadid bundles up in a cozy brown coat as she steps out in N.Y.C.'s Soho neighborhood on Monday.

T.I. gets into the giving spirit and gifts a student from Next Level Boys Academy clothes and shoes during the rapper's Harris Community Works Holiday Caravan at DTLR on Monday in Atlanta.

Liev Schreiber and Matilda De Angelis are seen in full character on the set of Across the River and into the Trees in Venice, Italy on Monday.

Babyface and Tori Kelly perform onstage at the City National Grove of Anaheim on Monday in Anaheim, California.

Common takes the stage to perform during the Souls to the Polls drive-in rally for Rev. Raphael Warnock on Sunday at Riverside EpiCenter in Austell, Georgia.

Tessa Thompson strikes a pose at the Amazon Studios Sylvie's Love drive-in premiere at Calamigos Ranch in L.A. on Sunday.

Lily James is seen on the set of What's Love Got to Do with It, as she tries to set a Tinder date on her phone, on Friday in London. 

Tarek El Moussa and Heather Rae Young soak up some sun in Cabo San Lucas, Mexico on Sunday.

Hasan Minhaj arrives at The Holidays at Saks Lights Up Fifth Avenue Ceremony on Friday in N.Y.C.

Bachelor Matt James enjoys a round of golf near his home in Jupiter, Florida on Saturday.

Parents-to-be Henry Golding and Liv Lo do some holiday shopping at the Westfield Mall in L.A. on Friday.

Rebel Wilson and her boyfriend Jacob Busch had some fun during a polo match in Aspen, Colorado.

Regina King attended Amazon Studios' drive-in event for her directorial debut One Night In Miami at the Calamigos Ranch in Malibu, California.

America Ferrera spoke at the Joy to the Polls event hosted at Lucky Shoals Park in Norcross, Georgia.

Dua Lipa was the musical guest on the Kristen Wiig-hosted episode of Saturday Night Live.

Rick Ross performed on stage during the Ross the Bells concert at the Miramar Regional Park Amphitheater in Florida.

Jennifer Garner wore a Christmas vest while out and about in Brentwood, California.