American singer-songwriter Bruno Mars is all excited for his 33rd birthday and has hired his fellow musician Ed Sheeran to sing `Happy Birthday` for him.Taking to Twitter, `The Lazy Song` singer uploaded a video in which he can be seen tucking into a birthday cake adorned with letters spelling out his first name. Sheeran, playing the guitar, then sang a birthday song for Mars, adding: Happy birthday two-time Super Bowl-performing Bruno.You know you`ve made it when you can hire Ed Sheeran to sing you Happy Birthday.#ExtraForever! #HappyBrunoMarsDay! , reads his caption. View this post on Instagram You know you’ve made it when you can hire Ed Sheeran to sing you Happy Birthday. 🍾🥂 #ExtraForever! #HappyBrunoMarsDay!A post shared by Bruno Mars (@brunomars) on Oct 8, 2018 at 5:02pm PDT× Mars, known for his superhit songs including `Uptown Funk` and `That`s What I Like`, headlined the Super Bowl half-time show in 2014 and joined Coldplay and Beyonce for the 2016 edition.The two global superstars will also go head-to-head at the American Music Awards in Los Angeles.