Wendy Roby rightly says that this song owes a debt to Weezer… actually, you know what?  Here’s her take on it in toto:

“‘In My Head’ is indebted to Weezer, with its fat-fingered riffs, gurning chorus and overall air of the best kind of doofus-penned pop songs; harmless, a bit daft and very amiable.  Every time a song like this comes along I am surprised at how not-awful I find it, but ‘In My Head’ just wants to have fun - so why am I giving it rules about which cups to drink out of and pestering it to wash its hands?  For a genre that is known for wearing ripped plimsoles and plaid-back shirts, we sure are uptight.  Don’t be uptight, everybody.”