The adorable kid above with the grandpa glasses is now a member of a Grammy-winning rock band. Think you know who it might be?

Here are a couple hints to help you out: The lad above is now a multi-instrumentalist, vocalist, producer and much more. The band he is most well known for released their fifth studio album earlier this year and it sold well over 200,000 copies in its opening week.

Can you guess who this musician is? Click on the button below to find out: