The 'Happy' hitmaker feels that the eight songs he wrote were always meant for Jackson but they were rejected by his team and were later given to Justin Timberlake, reported Contactmusic.
"I did eight songs for him that never made it to him, that ended up on Justin's record. Later he sang me all those songs and told me they should have been his and I told him they were for him," Williams said.
Jackson died of acute Propofol intoxication in 2009.
He laughed off comparisons between himself and Michael Jackson.