A theme song is the first thing we hear when we tune in to watch our favorite TV shows. Episode after episode, the music and lyrics are ingrained into our heads. Is there a ’90s kid out there who can’t recite the entire theme song for The Fresh Prince of Bel-Air? Doubt it! These theme songs are some of the most recognizable on the planet – from ’70s sitcoms to ’90s Saturday morning cartoons. There are even some modern gems thrown in for good measure and a few themes that are a nostalgia-filled trip down memory lane (hello Lizzie McGuire!). Can you recognize each one by just the first line of lyrics?