Miley Cyrus, Kellan Lutz break up rumors: Miley 'burned out" with Kellan?

Miley Cyrus and Kellan Lutz are reportedly over are a brief romantic fling. According to Perez Hilton.com, a source close to Miley explains, "[They] are not really hanging out anymore [because of] their hectic schedules at the moment ... just kind of burned out."

Previous reports had fans believe that the couple were going to make their relationship public any day now. According to E! News source, the twerking princess were getting close to making things official with the actor.

"She likes him a lot," the insider said. "There are a lot of similarities between Kellan and Liam. He is her type."

The "Wrecking Ball" singer is enjoying her brief romance with Kellan and was spotted giving a little mouth-to-mouth to each other in Las Vegas after the Britney Spears concert .

"They were making out and didn't seem to care who was watching." The source said, "It wasn't a secret that they were together. She kept grabbing him throughout the night, pulling him with her as she went to leave the venue around 3:30 a.m. You can tell he was into her."

Cyrus was first reported dating Liam Hemsworth's former friend, Kellan Lutz in December 2013. According to Us Weekly, the couple have been "hooking up ever since" early December. The singer even invited Lutz to the Bahamas over the Holidays where photographers caught then alleged couple getting off her private jet when she landed in Miami.