One, two, three, four, five, six, nine and ten, Money can't buy you back the love for your pretty hen

The story:

I was a a karaoke party, actually. My friend and I did it as a duet, and I was so caught up in the moment that I forgot to let her sing that part because I didn't know the real words. I blurted that out, because that's what I thought it was. I was so embarrassed, but I got a huge round of applause after.