Check out this video, which shows Nick, Kevinand Joe pulling each other close for a group hug before launching into one of their hit songs as the packed crowd goes wild. Clearly, Joe can rely on his siblings for their support in the toughest of times.
As we reported ... Joe filed for divorce from Sophie in Miami Tuesday, insisting their marriage is "irretrievably broken."
The former couple released a joint statement, saying they "mutually decided to amicably end our marriage" after "four wonderful years." They have a prenup, but the terms of the agreement have not been released.
As we reported, the trigger for Joe ... he's told confidants he heard/saw something with Sophie on Ring video that was the final straw. Sources tell TMZ the marriage was on the rocks for the last 6 months, in part because of different lifestyles.