Selena Gomez is rebelling against her parents by hooking back up with bad boy ex, the pint sized pot head Justin Bieber, Breaking Celebrity News has exclusively learned.

Gomez’s mom Mandy and stepdad Brian are “vehemently” opposed to Bieber, 20, said one source, with the parents “convinced” Bieber was responsible for driving their broken-hearted daughter to a secret stint in rehab last January.

"It's definitely against her parents wishes,” a source close to the 21-year-old “Come and Get It” singer told Breaking Celebrity News.