Avicii -- Gall Bladder Surgery Goes Off Without a Hitch

Avicii's gall bladder surgery was a total success ... and now the mega-popular DJ is on the road to recovery.

Avicii went into surgery this morning and sources close to the DJ tell us the procedure went smoothly.

We're told Avicii is currently holed up in his hospital room ... where he'll spend the next few days recovering.

As we previously reported, Avicii bailed on his gig Thursday at the Ultra Music Festival in Miami after he was rushed to the hospital due to severe abdominal pains, nausea and a fever.