Darren Criss and his Warblers better watch their backs! With 'Glee' on hiatus for the summer this little boy is filling the void with his spot-on impressions of the Dalton Academy singing group that captured hearts this season. The tiny Warbler has it all down -- the singing, the moves and and even the costume! He's just a little too young to be anyone's Teenage Dream yet.

The 'Glee' cast, complete with members of the Warblers, is on tour this summer performing hits from the series. Check out the mini Warbler's moves and tell us what you think!

Yesterday we heard a snippet from 'Glee''s upcoming "Teenage Dream" cover, and now the entire scene has been released online. Newbie Darren Criss serenades Kurt with the Katy Perry tune when Mr. Hummel transfer to an all-boys private school. Our favorite part: when Blaine adjusts the collar on Kurt's jacket -- super-adorable, and the kind of move that gets analyzed over and over again in countless teen magazines.

Katy Perry tweeted her approval, writing "Oh...My...Gosh... this just brought a sweet tear to my eye! Teenage Dream on GLEE makes my heart go WEEEEE!" Click through to watch.