The 52-year-old "Achy Breaky Heart" crooner bought his daughter a Can-Am Spyder St Limited three-wheeler bike for her milestone b-day.
Billy Ray took to Twitter to share a pic of Miley and mom Tish Cyrus trying out the new ride. "Happy birthday @mileycyrus @tishcyrus. Can't wait to hit the open road on our @officialspyder !!!" he wrotes with a pic of the mother-daughter duo smiling while driving the vehicle together.
Can-Am replied to Billy Ray, writing, "@billyraycyrus enjoy the ride!"
According to the company, the custom made vehicle cost $24,849 and can reach speeds over 100 mph. Billy Ray was spotted over the weekend driving the ATV around his Toluca Lake neighborhood with other daughter Noah Cyrus on the back.
Miley officially turned 21 on Saturday but celebrated last night with a big post-AMAs party at Beacher's Madhouse at the Roosevelt hotel in Hollywood. Kelly Osbourne, Emma Roberts, One Direction's Liam Payne and Niall Horan, Wiz Khalifa and Amber Rose were all in attendance.
Miley posted a pic from her cat-friendly AMA performance on Instagram today, writing, "thank you AMAzzz for a purrrrrfect night." She also shared a pic of her with pals, including producer Mike WiLL Made It, at last night's b-day party, writing, "Best birthday night ever @RealDenikaB @MikeWiLLMadeIt @Jessy_Cain."