Miley Cyrus is acting her age – for once. The teen star has apparently called it quits with her much-older boyfriend Justin Gaston, ending the relationship this past Sunday. “They have been having trouble for a while,” says a source close to the pair (Billy Ray? Is that you?).  “It’s been hard for a long time since Miley has been working so much and traveling a lot.”

Justin – who earns a living as a model – also supposedly got “a little jealous” of all the work Miley had been doing with her previous ex, Nick Jonas. Then there’s the whole issue with age – Justin is 20 while Miley is only 16. May we suggest a more age-appropriate love for the teen star? We hear Taylor Lautner – and his abs – is single!   [Photo: WireImage]