Jack & Jack Hit Vegas After Dropping 'Calibraska' EP

Jack Gilinsky throws it over to Jack Johnson during their concert at Vinyl inside the Hard Rock Hotel and Casino in Las Vegas on Thursday night (July 23).

The guys — who make up the fab Jack & Jack duo — just debuted their brand new EP, Calibraska!

“Damn the international support is insane for #CalibraskaEP as well. Thanks everyone around the world. You are amazing,” the guys wrote on Twitter.

Jack and Jack added later, “You guys are making us feel on top of the world today. Thanks for being with us for this journey.”

15+ pics inside of Jack & Jack performing in Vegas…