Miley Cyrus' father has treated the pop superstar to a customised new set of wheels to mark her 21st birthday.

Country veteran Billy Ray Cyrus reportedly handed the Wrecking Ball hitmaker the keys to a 2014 Can Am Spyder three-wheeled motorcycle, complete with her initials emblazoned across the front of the white bodywork.

A photo of the $24,000 vehicle, which was gifted to the birthday girl complete with a big gold bow, has been obtained by TMZ.com.

Meanwhile, Cyrus' birthday on Saturday (23Nov13) was made extra special thanks to a video compilation from her fans, who came together to send her their best wishes for her big day. The YouTube.com footage featured messages from devotees around the world and the singer/actress expressed her gratitude for the tribute on Sunday (24Nov13) by sharing the link on her Twitter.com page, writing, "My fans are the (s**t) I repeat. The (s**t)."

Cyrus spent Saturday perfecting her performance for the American Music Awards, which take place in Los Angeles on Sunday, but she managed to find some time to mark the occasion with friends and relatives, who presented her with a multi-colored five-layer cake she labelled "the gayest birthday cake ever" on Twitter.

She is reportedly set to let loose after the AMAs by hosting a private bash at the residence of party king Jeff Beacher, the man behind one of the star's favorite Hollywood hang-outs, Beacher's Madhouse.