David Guetta has said he knew that his track When Love Takes Over would be a hit.
"The first time I heard the track I immediately knew it would be a huge hit," he said.
The song, initially a Guetta instrumental until Kelly heard the track and pleaded to write and record a vocal over the top, went to number one all over Europe.
The 45-year-old DJ is set to release his new single Just One Last Time, on which he's joined forces with relatively unknown Swedish duo Taped Rai.
"It's always a bit hard to describe the secret ingredient that will actually make a track become a single," he said.
The DJ said he was taking a new approach to his work.
"From now on I'll make music without any deadlines, which I find very relaxing. I take much more pleasure that way. I'm really happy to work without any preconceived plan in my head.
"No demands, just me and my inspiration. No pressure."
:: David Guetta releases new single Just One Last Time feat Taped Rai on January 21. The album, Nothing But The Beat Ultimate, is out now.