The HBO True Blood series uses song lyrics for titles. That's what happened with the "Somebody That You Used To Know" episode. The problem is that between the time the idea got in to work and its completion the tune just got way too popular.
True Blood Music Supervisor Gary Calamar told CBS, 'Actually, when Mark Hudis first wrote the episode, he had the Gotye song in mind. At that point the song was new and just starting to become popular. By the time we got to post production on the episode the song was hugely huge. I think it's great, but once a song has been featured on Glee it's no longer right for True Blood end credits.' Luckily, there was an easy 'plan B': 'I knew this great song by Elliott Smith with the same title. We gave it a try and it worked beautifully.' The late singer/songwriter Elliott Smith released the song on his 2000 album, Figure 8.
So Gotye got the boot for being too mainstream.
Howlin' Wolf is another artist used often in the series, mostly for the seduction scenes. 'We tried a few things over the love scene, but when we cut in Howlin Wolf's blues classic 'Smokestack Lightning' we all knew this was the one to capture the wild sexuality of Alcide and Rikki.' True Blood has previously used covers of Wolf's 'Howlin' For My Baby' and 'Evil' on the show. 'Smokestack Lightnin'' is one of his most well known songs, and has been covered by The Yardbirds, The Animals and The Grateful Dead, among others
But the stand in of Elliott Smith? Nice save.