How I Spent My Summer Vacation

Tori Spelling's daughter Stella, 2, is her mini-me – right down to their matching bikinis, which the look-alike twosome wore during a trip to San Diego's La Costa Resort and Spa. "Yes, we both have our sunscreen on!" Spelling Tweeted.

The pop diva shared this photo from the Canadian leg of her Monster Ball tour as she fashioned some margarita-like drinks with tonic water and Patron tequila. "Canada isn't that dry, but it for sure kicks a–," she Tweeted.

Whee! Tweeted the author and fashion designer.

Spending her Independence Day on a yacht cruising Manhattan's Hudson River, the reality star and her family got a front-row view of Macy's annual fireworks display.

How else would this California Gurl celebrate the Fourth of July? the singer Tweeted.

The teen star spent her summer opening for the Jonas Brothers, performing to sold-out crowds. "And this is just our soundcheck!!! #BESTFANSEVER," wrote Lovato about the Hardford, Conn., stop of their tour.

Even though he spent time in Germany on tour with Good Charlotte, the singer didn't let his hectic schedule interfere with his workout routing.

How's the view up there? In Milwaukee to perform at Summerfest – billed as the "world's largest music festival" – Pickler took a break for a time-honored summer tradition – thrill rides! "On the sky glide," she Tweeted. "Yeehaw!"

Jessica Simpson met a boy, cute as can be, and engaged in a little summer lovin' on Twitter, sharing this photo of herself smooching beau Eric Johnson. "Romance 101..getting kissed by my Yalie...me not lookin' so smart...:) but YUM!" she wrote.

Tweeted the heiress, sharing this photo on a Jet-Ski on her European vacation.

She's the wind beneath his paws! While promoting Cats amp Dogs: The Revenge of Kitty Galore this summer, the actress posed with the movie's namesake star, the hairless cat she voices in the movie. "Here I am with the actor," she Tweeted.

The country star spent his summer on the H20 Tour – which lived up to its name during Paisley's stop in his home state of West Virginia. "H2O tour at it's wettest. This is not photoshopped."

the Olympian and fashion designer Tweeted, adding, "And Rex decided to come swimming with me." Now that's a real dog day of summer!

"Summer almost over for me and my gang!" Tweeted the model and furniture designer during a relaxing boat trip. "Enjoying the sunset!"

The Gym Class Heroes singer celebrated his 29th birthday with an Oreo-cookie cake and some cocktails. "Such a light weight these days I am! Couple bottles of moscato and a few shots and I'm counting sheep standing up," the "Billionaire" singer Tweeted.

Her summer job took her to new heights – literally! – when Trump checked out the construction site of the Trump International Hotel amp Tower in Toronto.

One proven way to beat the heat: ice cream! "If anyone in cincy hasn't had putz's ice cream, you haven't lived! It's the best," Tweeted Lachey, posting this shot of his swirled cone and the workers at Cincinnati's Putz's Creamy Whip.

Like Lachey, Hilton also dug into a frosty dessert, Tweeting from Monaco, . Yum!

Staying close to fiancé Swizz Beatz (and his vuvuzela) during the kickoff for the biggest sports event of the summer – the World Cup! – the expectant singer cheers after performing her hits "Fallin'" and "You Don't Know My Name." "Tonight was a celebration!" she Tweeted.