Today on Twitter, both Demi Lovato and Jordin Sparks tweeted Jason Derulo a very happy birthday! Though we wonder if the singer saw the birthday tweets since he said he would be celebrating his 22nd year for the entirety of September! Joel Madden wished his loving wife, Nicole Richie, a wonderful day and Hayley Williams of Paramore sent birthday wishes to her Grandat (yes, with a t). Ne-Yo finally set the record straight about the baby mama drama in his life, and he is definitely not engaged! Unfortunately, Glee star Cory Monteith and Matt Nathanson were both mourning the breakup of legendary band, R.E.M. Not to mention, we think Mr. Bruno Mars may be love! We wonder who the lucky lady is! See what your favorite stars were chirping about today!