Miley Cyrus breaks up with boyfriend Justin Gaston

Disney Channel star Miley Cyrus has broken up with her boyfriend of almost nine months and is tweeting about it.

According to E! News, the 16-year-old ended her relationship last week with underwear model and aspiring singer Justin Gaston, 20, as she prepared to leave L.A. for her two-month shoot for "The Last Song" in Savannah, Ga.

Though her rep had no comment, the teen star and her ex-boyfriend's Twitter posts over the weekend reflected the breakup. (Her June 8 tweets included: "trying to smile through a gloomy day in savannah," and "life will go on. you will smile again.") Gaston quoted lyrics from John Mayer's "Dreaming With a Broken Heart" in a June 4 tweet.

The couple went through a rocky path because of Cyrus' resurrected friendship with ex-boyfriend Nick Jonas, of the Jonas Brothers, E! News reported.

"She obviously has been hanging out with Nick again a lot, and Justin was cool with it at first -- as long as it was just a cool friendly thing," a source close to Gaston told E! News. "She didn't cheat, but I guess Nick was trying to get her back the whole time."

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