Awesome Music: Depending on who you ask, this can vary from "Un Giorno Per Noi" to "I'm Fucking Ben Affleck".
Broken Base: While Groban's projects are universally praised by his fans, the fans themselves have become a Broken Base over the their own behavior. This is usually seen as Official Forum Grobanites vs. LiveJournal Grobanites.
Covered Up: "Vincent (Starry, Starry Night)" by Don McLean, "You Raise Me Up" by Secret Garden, "Hymne à l'amour" by Edith Piaf, "She's Out of My Life" by Michael Jackson and "My December" by Linkin Park.
It was also the best selling album of 2007, selling 3.6 million copies...in only 11 weeks.
Don't Shoot the Message: Josh Groban actually has a large following of fairly normal fans, many of whom like him more for his off-colour behaviors and don't appreciate being lumped with the more rabid.