"Best bday evaaaaaa!!!!!!! Thank you my loooooove," Cyrus captioned a pic on Instagram. "Look at datttt Rainboooowwwwwwww rock! You always know how to make my "grubby little kid fingers" *SHINE*!!! (P.S. please take notice of that beautiful packaging!!!!)"
Hemsworth, 26, gave the "Wrecking Ball" singer a gold ring encrusted with colorful jewels for her big day. (She previously told Ellen DeGeneres that her gold Neil Lane engagement ring wasn't her style, but she wore it because it was from him.)
His wrapping skills were just as impressive. The Hunger Games actor decorated a gift box with gold string, colorful heart and peace sign stickers and a unicorn tag. "Happiest birthday to my favorite little angel!" he captioned a photo of Cyrus holding the final product.
Cyrus was treated to a birthday surprise on The Voice set too. On Tuesday, her fellow coaches — including Adam Levine, Blake Shelton and Alicia Keys — celebrated with a birthday cake that featured the customized smiley face design of her Happy Hippie Foundation. She founded the organization in 2014 to help homeless LGBT youth.
"Thank you to my Voice family for making my birthday soooooo special," she captioned an Instagram pic of the dessert.
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!