Kevin Mazur/WireimageMiley Cyrus and her boyfriend Liam Hemsworth have reportedly split up. An insider told Us Weekly that the lovebirds have been "on and off" for a while, but now it's official. There are some reports that claim Hemsworth was unfaithful, but other people think that the two have been torn apart by Miley's new found "wild side." I'm going to go out on a limb and go with the latter reason. I don't really blame Miley for running around pantsless the past few months. She obviously runs her household and nobody is going to tell her how to act when she's paying the rent. When your dad is Billy Ray Cyrus you don't have much of a shot. It's like being born with a great father, but exactly the opposite.