United Kingdom, July 16 -- Avril Lavigne sang Sk8er Boi at Taylor Swift's wedding.

Former WWE and NFL star Pat McAfee was in attendance at Madison Square Garden on July 3 to see Taylor and her husband Travis Kelce tie the knot, and has opened up about the musicians who got up to treat guests to some surprise performances.

Speaking on The Pat McAfee Show, he said: "Stevie Nicks played, Taylor was up with them, obviously. Avril Lavigne - I don't want to give away too much. But it was the greatest night of all time."

In another episode, he added: "I guess me saying Avril Lavigne played 'Sk8r Boi' was the first time that it came out. But she was awesome."

Pat also revealed that the atmosphere was kept relaxed, with each musician getting c...