Miley Cyrus turns 21 this Saturday, and in honor of her milestone birthday, MTV is celebrating by allowing her to call the shots on Sunday from noon till 8:00 p.m.

Beginning with the special 21 Candles: Miley's MTV Moments MTV will look back at her
performances and videos over the years. Next they plan to rerun her documentary Miley: The Movement with additional footage.

Want to be a part of Miley's special moment? Tweet #HappyBirthdayMiley or post Instagram video messages that may appear while she's in control.