New X Factor USA judges Britney Spears and Demi Lovato joined forces to wish a very happy birthday to fellow judge L.A. Reid — the trio enjoyed some bday cake and a song. Simon Cowell missed the festivities since he is out with bronchitis (Louis Walsh is subbing in). 

A source told E! News: “L.A. was completely not expecting it. He was trying to keep his birthday kind of a secret but at the end of their break, Britney surprised L.A. with a huge chocolate cake while singing ‘Happy Birthday.’ It was cute.” The source added,  “Demi drew him a picture saying ‘LA & Demi – BFF – Besties.'”