He said Oh that pizza is cold.

The story:

For the longest time I thought he was singing about pizza in that part and I was with a bunch of my friends and we were listening to Some CDs and that song came on. I was the only one singing along at this point and when the song came to that part I sang it and everyone just started cracking up. I was like "Yeah I know isnt that part funny?" I thought they were laughin at the lyrics not me!