The network has several programs lined up to air on November 23 starting at 12 P.M. ET to celebrate the singer/actress' birthday.
MTV has prepared a special gift for Miley Cyrus on her birthday. As the star turns 21 on November 23, the network will dedicate eights hours of programming to the former "Hannah Montana" star.
The celebration begins at 12 P.M. ET/PT on Sunday with the debut of "21 Candles: Miley's MTV Moments", an all-new original special that "looks back at her iconic music videos, performances and MTV milestones."
Later, the network will re-air the documentary "Miley: The Movement Deluxe Edition", featuring all-new commentary from the "We Can't Stop" singer. It will be followed by "Awkward" and "Snooki & JWoww", Cyrus' favorite MTV shows.
Fans are invited to send birthday wishes via Twitter using the hashtag #HappyBirthdayMiley or via Instagram video messages. Their messages have a chance to appear on MTV during the Miley marathon from 12-8 P.M. ET.
Prior to that, MTV recalled Cyrus' best moments on Throwback Thursday with a clip from the 2008 VMAs where the former Disney Channel darling freaked out when someone pointed out there's a bee on her.