1. The Misfits/Joy Division
Via etsy.com
2. Justin Bieber/Black Flag
Via fashionablygeek.com
I actually own this one and can confirm the following two things about it: 1) It is amazing and 2) It will get you into bar fights.
3. Oasis/Blur
Via rollingstone.com
4. Descendents/Discharge
Via etsy.com
5. Ray Charles and Jimi Hendrix
Via etsy.com
6. Grateful /Dead/ Kennedys
Via dangerousminds.net
Punny.
7. Metallica/Anthrax
Via teevault.com
8. The Rolling Stones/Led Zeppelin
9. The Beatles/Kiss
Via fanisetas.com
10. Morrissey/Mayhem
11. All of these MTV shirts
Via clioawards.com
The Beatles/Oasis, Madonna/Lady Gaga, Billie Holiday/Amy Winehouse, The Velvet Underground/The Strokes, The Ramones/Green Day.