Selena Gomez cannot keep her eyes or hands off Justin Bieber during a bday party

They were on, they were off, but now it seems Justin Bieber and Selena Gomez have bowled a strike in love once again.

The pop pair was spotted kissing and canoodling at Lucky Strike in Hollywood on Sunday night.

According to E! News, the couple did not keep their PDA a secret as they celebrated Justin's childhood friend Ryan Butler's birthday.