I can't believe I never noticed at the seven concerts I've been to but I guess Clay Aiken does this long cover medley of songs to entertain his audience. It drives the 13-year-old girls absolutely crazy. If you have a spare five minutes, I found a clip (longer clip here). FYI - Here's a list of songs in the medley:

1. Baby Got Back (Sir Mixalot)
2. Like A Virgin (Madonna)
3. Bills, Bills, Bills (Destiny's Child)
4. 1999 (Prince)
5. She Thinks My Tractor's Sexy (Kenny Chesney)
6. Oops...I Did It Again (Britney Spears)
7. OPP (Naughty By Nature)
8. Yeah (Usher)
9. SexyBack (Justin Timberlake)

Via one of my exclusive embedded sources, I managed to get my hands on a set list for the medley Clay's performing at Jones Hall in Houston, Texas TONIGHT:

1. It's Raining Men (The Weather Girls)
2. It's Raining Men (The Weather Girls)
3. It's Raining Men (The Weather Girls)
4. It's Raining Men (The Weather Girls)
5. Dancing Queen (ABBA)
6. It's Raining Men (The Weather Girls)
7. It's Raining Men (The Weather Girls)
8. It's Raining Men (The Weather Girls)
9. It's Raining Men (The Weather Girls)

Thanks ONTD