Star Tracks: Monday, August 23, 2010

Jennifer Lopez shines in sequins as she joins hubby Marc Anthony onstage at a concert in Veracruz, Mexico on Saturday.

What a proud papa! Ben Affleck carries a smiling 19-month-old Seraphina after a visit Sunday to City Treehouse, an indoor playground in N.Y.C. with wife Jennifer Garner and daughter Violet, 4, (not pictured).

We hope Mariah Carey's Brazilian fans like fun! In a cheeky T-shirt, the singer performs Saturday at the annual Rodeo Festival in Barretos, Brazil. "Thank you SO much 2 everybody in Brazil…you always show me loveampI am so GRATEFUL!," the gracious star Tweeted.

Is 'B' for Bachelorette? Boston native Ali Fedotowsky shows her hometown some love, working up a sweat during a softball game in San Diego on Sunday.

Reality star Holly Madison strikes a pose in knee high socks and short shorts – an unexpected outfit for hosting a weekly bikini contest at Planet Hollywood's Pleasure Pool in Las Vegas on Saturday.

Before taking home two awards, Neil Patrick Harris cozies up to equally dapper partner David Burtka at Saturday's 62nd Primetime Creative Arts Emmy Awards at the Nokia Theatre in Los Angeles.

After a busy week filming an appearance on Glee, Britney Spears indulges in some retail therapy with boyfriend Jason Trawick Sunday in Calabasas, Calif.

Are they or aren't they? Justin Long and Drew Barrymore get close backstage during the Virgin Media V Festival Saturday in Chelmsford, Essex. The on-again, off-again pair are overseas promoting their new film, Going the Distance.

Talk about a double take! Katie Holmes seriously channels former First Lady Jacqueline Kennedy on Friday, sporting an iconic pink suit and matching pillbox hat while filming The Kennedys in Toronto, Canada.

Three's company, four is a crowd? Father-to-be Orlando Bloom and his Three Musketeers costars – Milla Jovovich, Mads Mikkelsen and Christoph Waltz – visit Munich, Germany, on Friday to promote their upcoming action film.

Beyoncé and hubby Jay-Z take in the sights on Friday, motoring around with friends while on vacation in Portoferraio, Italy.

Bachelor Jake Pavelka stays on top of his GTL program, visiting The Sports Club/LA twice in one day, then getting his tresses done at a Beverly Hills salon on Thursday.

Taylor Momsen shows off her self-professed alongside her Pretty Reckless band mates at the release of their new album Light Me Up in London on Friday.

Also in the U.K.: Drew Barrymore, who's promoting Going the Distance overseas, continues her wild fashion streak Friday in London – in a furry cape and a handmade tattoo!

That's the best he could do? Jersey Shore's Paul "DJ Pauly D" Delvecchio mounts a mini-motorcycle on Friday after wrapping up the workday at a Seaside Heights, N.J., T-shirt shop.