Now, we have the complete list of attendees:
- Justin Bieber: A teen star sure to sell out tickets fast.
- Bruno Mars: He loves you "Just the Way You Are."
- Michael Buble: He dressed up as Bieber for a music video ... this could be awkward.
- B.o.B: He collaborated with Bruno on "Nothin' On You"
- Tiao Cruz: He's only going to "Break Your Heart."
- Travie McCoy: He really wants to be a "Billionaire"
- Enrique Iglesias: The guy returned to form this year with "I Like It"