The producer has been working on the record with the pop star
Rumours had suggested Gaga would be making an appearance at the festival
Former Number One hit was the biggest-selling song of 2015
Hozier, Adele and Ellie Goulding also featured in the year’s Top 10
Taylor Swift, Sia and Adele also score big in Vevo's Top 10 chart
2015 film has been criticised by Winehouse's father, Mitch
Mark Ronson and Bruno Mars hit given Hollywood makeover
The song overtakes 'Mull of Kintyre' but trails Pharrell's 'Happy'
Lana Del Rey releases new album 'Honeymoon' in September
The DJ/producer says he expected more from the rapper