Katy Perry and John Mayer's Romantic, Low Key Night Out

(Harry Styles signs autographs as he heads into the Late Show With David Letterman in NYC.) 

(Taylor Swift with her friends after dinner at Alkade restaurant on a night out in Madrid.) 

(Justin Bieber watches an NBA basketball game between the Los Angeles Clippers and the Boston Celtics at the Staples Center.) 

(Nick Jonas is seen leaving Katsuya restaurant in Hollywood with his brothers.) 

(Niall Horan does some shopping at Armani Exchange and H&M in Los Angeles.) 

(Robert Pattinson and Kristen Stewart seen arriving together at LAX after flying in from NYC.) 

(Zayn Malik of One Direction poses for pictures with fans as the band heads back to their hotel in NYC.)

(Selena Gomez arrives at LAX to catch a flight out of town.) 

(Cory Monteith signs autographs for fans as he leaves the Staples Center after watching The Black Keys in concert.) 

(Kevin Jonas and wife Danielle Deleasa leave Katsuya restaurant in Hollywood.) 

(Jennifer Lawrence smiles as she arrives at the Late Show With David Letterman.) 

(Joe Jonas leaving Katsuya restaurant in Hollywood with his brothers.) 

(Rihanna enjoys a night out partying with friends at Hyde night club in West Hollywood.)

(Ed Sheeran stops by the Z100 radio station in New York City for an appearance on Elvis Duran and the Morning Show.) 

(Liam Payne gets in the car with some friends after leaving the Mahiki Nightclub in London.) 

(Kendall and Kylie Jenner wearing Badgley Mischka on the runway during The Heart Truth 2013 Fashion Show.)

(Nikki Reed goes for a morning run with her dog Enzo in Los Angeles.) 

(Josh Hutcherson makes his way through the airport at LAX where he was swarmed by eager autograph seekers.)

(Jennifer Lawrence arrives into Heathrow airport in a purple fedora hat and sunglasses in London.)

(Victoria Justice is seen crossing the street in New York City.)

(Max George of the British boyband The Wanted arrive at LAX airport to a mass of fans who are eager to give presents to the boys.)

(Siva Kaneswaran and Jay McGuiness leaving the Saddle Ranch after dinner with some friends.)

(Tom Parker follows close behind his band mates as they leave the Saddle Ranch after dinner.)

(Miley Cyrus poses up outside of the Rachel Zoe Fall 2013 Fashion Show during New York Fashion Week.) 

(Miley Cyrus arrives for the Marchesa Fall 2013 fashion show during Mercedes- Benz fashion week in NYC.)

(Miley Cyrus shows up to her Cosmopolitan cover celebration at the Acme Restaurant in NYC.)

(Demi Lovato walks up to the stage on crutches before performing at the Grove shopping center in Los Angeles.) 

(Musical couple Katy Perry and John Mayer are seen leaving Vincenti restaurant after having dinner on Valentine's Day.)