Here are photos of the 10 most popular celebrities on Facebook, who do you think has the best smile? Cast your votes!

1 Cristiano Ronaldo (credit: ronaldo7.net)

2 Shakira (credit: instyle.com)

3 Vin Diesel (credit: tsquirrel.com)

4 Eminem (credit: southpawer.com)

5 Rihanna (credit: enstarz.com)

6 Lionel Messi (credit: reuters.com)

7 Michael Jackson (credit: positivelymichael.com)

8 Will Smith (credit: celebritiesinnate.com)

9 Bob Marley (credit: pinterest.com)

10 Justin Bieber (credit: entertainmentwise.com)