Justin B. & Selena G. V. Miley Cyrus & Liam H.: Who’s The More In-Love Couple?

Both Justin & Liam have traveled to support their ladies — but what pair is the most passionate?

Justin Bieber is so supportive of his girlfriend Selena Gomez as of late, and their romance is only matched by the passion between Liam Hemsworth and Miley Cyrus! All of these young stars can’t seem to keep their hands off each other!

Justin, 17, and Miley, 19, have been inseparable as of late, with Justin’s latest act of passion showing up backstage to watch Selena Gomez’s July 28 Boca Raton concert. Meanwhile, Miley, 18, showed up to Michigan this week where Liam, 21, has been filming The Hunger Games.

In fact, both couples have histories of supporting each other on the road. Liam has flown with Miley to his native Australia to see her perform with his family, while Selena was Justin’s date for his appearance at the 2011 ESPY Awards.