Article continues below advertisementPaul Anka was involved in a bitter clash with Michael Jackson over a song they co-wrote in the early 1980s, and OK! has the inside story of the pair's rivalry.Legendary singer Anka, 84, once admitted he was "beyond p-----" when Jackson allegedly "stole" the recording from Anka's home studio, igniting a feud that would linger for decades.Anka first met Jackson and his family in the 1970s when they attended his Las Vegas shows.Article continues below advertisementSource: MEGAMichael Jackson allegedly 'stole' a song from Paul Anka's home.