HOT GALLERY: Nick & Joe Jonas' Icy Treat On the Go

We wonder what could be making Nick and Joe Jonas laugh so much? Could it be brain freeze, perhaps? The JoBros headed out for an ice cream treat on Wednesday in L.A. and seemed mighty entertained by having their picture taken.

Maybe Joe finds it funny that he is once again being linked to ex Taylor Swift?

OK! NEWS: TAYLOR SWIFT'S DILEMMA: SO MANY GUYS, SO LITTLE TIME

The two waved at photographers before walking to their separate cars and driving off. Hope they weren't eating ice cream while driving!