Star Tracks: Friday, February 14, 2014

01 of 18

BALANCING ACT

Demi Lovato kicks up her boots on stage during a stop in Anaheim, Calif., on her Neon Lights tour on Thursday. "Anaheim – you were UNBELIEVABLE!" she Tweeted after the concert.

02 of 18

IN THE 'HOUSE'

Looking good, Kevin! House of Cards star Robin Wright can't help but admire costar Spacey during the season 2 premiere of their hit Netflix series in L.A. on Thursday.

03 of 18

DOWN & DIRTY

Prince William and younger brother Prince Harry shed their royal garb for some wet pants and a sand bag to help with a flooded area around a school on Friday in Datchet, England.

04 of 18

HELPING HANDS

Kate Beckinsale and Pink lend their time and talents to a worthy cause on Thursday, helping to raise funds for Saint John's Health Center's Margie Petersen Breast Center at a charity yoga event in Los Angeles.

05 of 18

SELF(IE) AWARENESS

Elizabeth Banks puckers up as she snaps a picture on her phone at the Listerine 21 Day Challenge event in Inglewood, Calif., on Thursday.

06 of 18

FREQUENT FLYER

I'm with them! Benedict Cumberbatch poses with two flight attendants at the BAFTA New York Presents: In Conversation With Benedict Cumberbatch event, sponsored by British Airways, in New York City on Thursday.

07 of 18

SET DRESSING

Natalie Portman takes a stand while filming her latest drama A Tale of Love and Darkness (which she also directs!) Thursday afternoon in Jerusalem, Israel.

08 of 18

THE CHAMP

Sylvester Stallone makes his way back to the boxing ring to celebrate the first preview performance of the Broadway production of Rocky with stars Margo Seibert and Andy Karl Thursday night in New York City.

09 of 18

EYES ON THE PRIZE

Will Ferrell keeps his focus on what matters during a Lakers Girls dance at L.A.'s Staples Center on Thursday, where the Oklahoma City Thunder defeated the home team 107-103.

10 of 18

SUIT YOURSELF

A slimmed-down Mark Wahlberg is all business on Thursday while filming his new movie The Gambler on location in Beverly Hills.

11 of 18

SING-ALONG

Zach Braff is pitch perfect alongside costar Marin Mazzie while rehearsing for the upcoming Broadway production of Bullets Over Broadway Thursday in N.Y.C.

12 of 18

PRETTY IN PASTELS

Taking a break from awards season, Oscar nominee Lupita Nyong'o joins Naomi Watts for Thursday's Calvin Klein Collection show during New York Fashion Week.

13 of 18

MELT YOUR HEART

SEXIEST HUMANITARIAN ALIVE — Per-Anders Pettersson for UNICEF/Wenn

His heart is in the right place! Goodwill Ambassador David Beckham spreads the love Thursday on a UNICEF trip to Tacloban, a Philippines city heavily damaged by November's Typhoon Haiyan.

14 of 18

MAKING A SPECTACLE

Kristen Stewart – who recently admitted that she can't handle the spotlight – keeps a low profile in a baseball cap, T-shirt and jeans while on the move in Hollywood on Thursday.

15 of 18

FEEL THE LOVE

Colin Farrell and costar Jessica Brown Findlay dress up for Thursday's London premiere of their new romance Winter's Tale – out just in time for Valentine's Day.

16 of 18

RUN FOR IT!

Proving how she keeps her fit form, Lea Michele goes for a jog around Coldwater Canyon Park in L.A. on Thursday.

17 of 18

SPREADING CHEER

Time to pull the lever! Mariah Carey turns N.Y.C.'s Empire State Building red and pink on Thursday ahead of the 20th annual Valentine's Day wedding event "Love Above All," in which three couples will wed atop the landmark.

18 of 18

LONDON LAD

Simon Cowell beams brightly as he makes his way to the latest round of auditions for Britain's Got Talent Thursday at London's Hammersmith Apollo.