<human>: I'm a fan of Stone Temple Pilots. After being introduced to their music by a friend of mine, I went bought the album "Purple" and "Thank You" (core wasn't in stock at the time). A few months ago, this same friend sent me the song Cumbersome, and it was just really catchy. I really like that song.

I'm kind of particular about my music and how it's organized, if it has the album artwork in my iTunes library, etc... So I Google and wiki search the title and artist hope for the best. Some sites via Google labeled the lyrics as written by STP. Others label it as written by Seven Mary Three. I'd never heard Seven Mary Three before, so I moved on... 

Wikipedia turned back nothing relating to the terms I'd entered (and Jimmy Wales was getting to me), so I closed the window and continued browsing Google. Then I saw a Yahoo! Answers article about exactly what I was trying to find out - did STP write that song? No, turns out they didn't. Turns out it was Seven Mary Three, and both bands just happened to sound similar in their early days.

Not like I suffered an identity crisis because of this, but it just feels weird to me when this happens (it's happened a couple times before, this is just the most recent occurrence). Has this ever happened to you? What song and artist? How did you feel?

Summarize the given text in a few sentences.
<bot>: I like Stone Temple Pilots. Thought 'Cumbersome' was their song. Turns out it's by Three Mary Seven. Gasp!