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Why they broke up: Oasis was plagued with infighting due to the tumultuous relationship between brothers Noel and Liam Gallagher. Noel left the band in 2009 after Liam reportedly broke his guitar before a concert. Noel later posted a statement on Oasis' website, "with some sadness and great relief...I quit Oasis tonight. People will write and say what they like, but I simply could not go on working with Liam a day longer."
Why we wish they didn't: