Justin Timberlake has admitted that he dreamed of collaborating with Madonna before the opportunity came up.
The pair teamed up earlier this year to record their hit single 4 Minutes, which appears on Madonna's 11th studio album Hard Candy.
Enjoying phenomenal success, the song topped the charts in countries including the UK, Australia, Belgium, Brazil, Canada, Germany, Israel and many more.
Timberlake recently told Hello! magazine: "Working with her was definitely a dream of mine. And when it came to actually doing it - it was everything you'd think it would be!
"It was great and it was bad and it was cool and it was tedious sometimes and it was fun and we went down into the valleys together and we came out on top of mountains."
Madonna recently celebrated her 50th birthday in London.