Taylor Swift kisses Calvin Harris during Billboard Music Awards 2015

American singer/songwriter Taylor Swift kissed rumoured boyfriend, Scottish singer/DJ Calvin Harris during the Billboard Music Awards 2015, held at the MGM Grand Arena in Las Vegas on 17 May.

The 25-year-old Shake It Off singer gave Rita Ora's former boyfriend a kiss before heading up on stage, as she won the award for Top Billboard 200 Album for 1989.

"I am so happy to win for 1989 because I was so lucky to get to work with people like Max Martin and Ryan Tedder and Imogen Heap… And then we put it out and you guys embraced change, embraced me doing something new," Swift said. "I'll never forget it. To the fans I talk to online, and the ones I see at the shows, I love you much more than I'll ever be able to say to you."

Later that night, Swift also won the Top Female Artist title.

"To win female artist is incredible because one of the best things to happen to me is I have surrounded myself with incredible women. To all the girls out there thank you for this award," she said in her speech.

Rumours that Swift and Harris are dating started after the pair were pictured shopping in Nashville, dressed similarly, both wearing grey and black.

Later, the two were spotted at a Kenny Chesney concert, getting cosy in the audience.

It was previously revealed that Swift has been single since splitting up with One Direction singer Harry Styles, after the pair dated for a whirlwind two months in 2014.

Swift has a history of dating high-profile celebrities and has previously been linked with Jake Gyllenhaal, Joe Jonas, Taylor Lautner, John Mayer, Zac Efron and Conor Kennedy.