Everyone has to put their foot in their mouth sometimes, even notoriously outspoken artists like English singer-songwriter Lily Allen. On Monday (May 6), the "Smile" singer formally apologized to Elton John for her years-long resentment of him - and she also revealed how it all stemmed from a grave misunderstanding on her part.

"I was quite cross with him for a few years for not having responded to this letter because I'd been very vulnerable and open," recalled Allen

Lily Allen and Elton John had a non-existent beef for years. During the Monday, May 6, episode of her "Miss Me" podcast for the BBC, the "Smile" singer, 39, opened up about how she was mad at the rock legend,

Lily Allen has revealed she held an unfounded grudge against Elton John for several years. The singer admitted she was upset with the star after he didn't respond to a heartfelt letter she wrote him - until she realised she never actually sent it.