LOS ANGELES - Adam Sandler and Jennifer Aniston are America's box-office sweethearts, but Justin Bieber is the valentine for teens.

The Valentine's Day weekend was a close one as Sandler and Aniston's romantic comedy, "Just Go With It," debuted with $31 million, according to studio estimates Sunday.

That was just ahead of the concert documentary "Justin Bieber: Never Say Never," which opened a close second with $30.3 million.

Sony's "Just Go With It" and Paramount's "Never Say Never" were close enough that the rankings could change when studios release final numbers Monday.

Another love story, Disney's animated adventure "Gnomeo & Juliet," opened solidly at No. 3 with $25.5 million. The movie features the voices of Emily Blunt and James McAvoy in a twist on "Romeo and Juliet" told with garden gnomes.

The weekend's other new wide release, Focus Features' ancient Roman saga "The Eagle," was No. 4 with $8.6 million. The film stars Channing Tatum and Jamie Bell on a quest into the wilds of 2nd century Scotland.

1. "Just Go With It," $31 million.

2. "Justin Bieber: Never Say Never," $30.3 million.

3. "Gnomeo & Juliet," $25.5 million.

4. "The Eagle," $8.6 million.

5. "The Roommate," $8.4 million.

6. "The King's Speech," $7.4 million.

7. "No Strings Attached," $5.6 million.

8. "Sanctum," $5.1 million.

9. "True Grit," $3.8 million.

10. "The Green Hornet," $3.6 million.

ASSOCIATED PRESS