"
So you think you're so cool for breaking my heart, not once but twice
Are you serious bro?
Will I get over you one day?
Woo woo woo you know it
His ex-girlfriend cheated on him so that broke his heart the first time. The second time she just broke up with him.
P.S. John Cena was the guy who his ex kissed without telling Zack.
Sources: I've seen this segment on a show a lot.