Nicki Minaj has revealed that she was surprised when Madonna leaned in to kiss her during their Super Bowl half-time performance earlier this year.

The 29-year-old Starships rapper, who made headlines earlier this year when 53-year-old Madonna snogged her on stage in February, insists that the gesture was not planned.

Speaking to the Sun she said: "I had no idea it was going to happen, but Madonna is a bad-ass - she's the ultimate bad-ass. She has very soft lips, though."

However, the reportedly bisexual R'n'B star admitted that she also felt that honoured to have locked-lips with the veteran popstar. "You know if you get kissed by Madonna you get sanctified.

"She went in for a kiss. No, it wasn't a tongue, it was just a kiss, but she did it."

The Young Money Cash Money artist and rapper M.I.A were hand-picked by Madge to join her on stage for a rendition of their collaboration Give Me All Your Luvin' during the event's half-time show.

Meanwhile, Minaj, who has been visiting London to promote her No.1 album, Pink Friday: Roman Reloaded, recently sparked breakdown fears when she went off on fans and deleted her Twitter account.

She lashed out following the unauthorised leak of her latest album by fan site

Opening up her resent erratic behaviour during her appearance on the Graham Norton show, she said: "A voice in my head told me to delete my Twitter and that's what I did.

She added: "I had 11 million followers and I hope they will wait for me."