On Easter Sunday, Sean 'Diddy' Combs held a virtual dance-a-thon on Instagram to raise money for coronavirus relief.And ex girlfriend Jennifer Lopez made a surprise cameo during the broadcast with fianceAlex Rodriguez from the comfort of their Los Angeles home.During the couple's stint on Diddy's stream,Jennifer revealed that Rodriguez is the 50-year-old music mogul's 'biggest fan.' Reunited:Jennifer Lopez made a surprise cameo during Sean 'Diddy' Combs' broadcast on Easter Sunday with fiance Alex Rodriguez from the comfort of their Los Angeles homeAccording to Lopez, the former pro baseball player constantly asks her to play her ex's songs.So, as part of the obligatory dance portion of the livestream, Diddy played some tracks of his own.