Ed Sheeran
"Don't", Sheeran's #3 song on his album × (pronounced "multiply"), was released in 2014 and was nominated for several awards. The song was about how Ellie Goulding was cheating on him with One Direction's Niall Horan. In the song, it says, "it's not like we were both on tour. We were staying on the same hotel floor." Goulding did, in fact, cheat on him while they were staying in the same hotel. Sheeran thought it was very easy to forgive Goulding after he found out about it.