Check out these pics to see, and find out if your predictions are spot on!
Miley Cyrus
2011: Rank No. 21
2010: Rank No. 10
Photo: BillboardGreyson Chance
2011: Rank No. 15
2010: Rank No. 9
Photo: BillboardWillow Smith
2011: Rank No. 14
2010: Rank No. 7
Photo: BillboardCody Simpson
2011: Rank No. 13
2010: Rank No. 20
Photo: BillboardVictoria Justice
2011: Rank No. 10
2010: No Ranking
Photo: BillboardNick Jonas
2011: Rank No. 8
2010: Rank No. 6
Photo: BillboardDemi Lovato
2011: Rank No. 7
2010: Rank No. 8
Photo: BillboardSelena Gomez
2011: Rank No. 3
2010: Rank No. 3
Photo: BillboardJustin Bieber
2011: Rank No. 1
2010: Rank No. 2
Photo: BillboardTo peep all 21 of ’em, visit Billboard.com. Are you surprised that Bieber ranked at #1 or not so much? Who do you think deserved to be in the top spot? Sound off in the comments!