In 1996, Garth Brooks set a record for signing autographs by doing so for 23 straight hours. Never did he ask for or take a break to eat, sleep or even use the bathroom. The marathon session happened at Fan Fair in Nashville, the week-long party now known as the CMA Music Festival. If you're looking for a reason for Brooks' popularity, look no further than his commitment to fans.

Taylor Swift has shown a similar commitment to her fans, and she held a mini-marathon session in 2008, signing over 900 autographs for eight straight hours with no break. That's only a third of what Brooks did, but still much more than even the most dedicated artist will sit still for in the Nashville heat. In reality, most stars don't have 23 hours worth of fans.