If you're a big fan of the Eagles, you may wish to skip this post, as I ruined Mama-Lu's appreciation of their concert with my observation.
During their 9-11 tribute song, I couldn't help but remark that they sounded like a boy-band. It was in a partly jokingly manner that I made the initial observation until the key change about 3/4 of the way through the song that sounded straight out of 98 Degrees.
Many of the remaining songs fleshed out the creepy resemblance. I'll never listen to the Eagles in the same way again...
