Justin Bieber Steps Out With Lipstick Kiss Mark on His Cheek (PHOTOS)

Selena Gomez better watch out — another girl has been smooching her man.

After filming The Jonathan Ross Show in London Thursday night, Justin Bieber recieved a special gift from a female fan outside the TV studios when she planted a wet one on his cheek and left behind a bright red lipstick mark.

Feeling a little cheeky (no pun intended), the 18-year-old kept this little “souvenir” in plain sight as he headed back to his hotel.

But this wasn’t the first time Biebs was kissed by a stranger this week…

 The “Boyfriend” crooner was greeted by a swarm of screaming fans outside his hotel Wednesday, where a lucky tween got to kiss JB on the cheek as he snapped a photo.

Bieber managed to sign a few autographs before being rushed off by security, but that didn’t stop the hoard of girls from running after their favorite pop star.

The Canadian singer recently made an appearance on NBC’s Today to dish about his maturing career, telling Ryan Seacrest that he hopes people will see him as more than just another teen idol one day.

“I feel like I just don’t want to be another teen heartthrob,” he said. “I just think that just annoys me. To think that’s what people will – will think of me – or, like, I just want to prove people wrong.”

Do you think Bieber will ever shed is tween dreamboat status? Sound off below.