VIDEO : Miley Cyrus Shares Birthday Love For Liam Hemsworth

Miley Cyrus shared a sweet message to longtime partner Liam Hemsworth for his 28th birthday on Friday. The 25-year-old ?Malibu? singer posted a collage of them, writing, ?Happiest birthday to my very best friend on the entire planet! I <3 u!? The 'Hunger Games' actor shared his own birthday post of a candle-topped pizza, captioning it, ?Perfect birthday?minus my dads hairy fingers diggin in my pizza. Thanks for the bday wishes everyone.? A source told Us Weekly in December that the pair "consider themselves married" and "still have zero plans of having an actual wedding.?