Celebrity Harry Styles Rings in 21st Birthday with Chris Martin, Jennifer Lawrence and Adele The One Direction singer celebrated his big day in Los Angeles with A-list friends By Melody Chiu Melody Chiu Instagram Twitter Melody Chiu is a Senior Editor for PEOPLE. She has been with the brand since 2009, editing, writing and reporting across all entertainment verticals. She oversees PEOPLE's music and events coverage and has written cover stories on Taylor Swift, Selena Gomez, Melissa McCarthy, Blake Shelton and Sandra Oh. The Los Angeles native graduated from the University of Southern California and has appeared on Extra!, The Talk, Access Hollywood and Good Morning America. People Editorial Guidelines Published on February 1, 2015 07:20 PM Share Tweet Pin Email Photo: Pascal Le Segretain/Getty Now this is one star-studded birthday! Harry Styles brought out Hollywood’s A-list to his birthday bash in L.A. on Saturday night. On the guest list were on-again couple Chris Martin and [CELEBRITY_LINK” “” “” “0” ], as well as Styles’ new gal pal Nadine Leopold. Others at the One Direction boy-bander’s 21st birthday party included David Beckham, Adele, Adam Levine, ex-fling Kendall Jenner, Courteney Cox, Rashida Jones and fellow Brit Cara Delevingne, a source tells PEOPLE. Styles had not one cake, but four from Hansen s Cakes – and his happy face graced the tops, says the insider, who added that photos were not allowed at the super-starry bash. “When he blew out his birthday candles, he FaceTimed his mom,” says the source. “He was so sweet to all his guests.”