The X Factor star's new song 'You Bring Me Joy' has topped the midweek chart update, while The Script remain at two with 'Hall Of Fame'.
Ne-Yo slips to three with 'Let Me Love You', Little Mix stay put at four with 'Wings' and Flo Rida climbs to five with 'I Cry'.
Tulisa is currently at number 10 with her second solo single 'Live It Up', while The Killers land at 15 with new cut 'Runaways'.
Mumford & Sons follow at 19 with 'I Will Wait', David Guetta and Sia are at 20 with 'She Wolf (Falling To Pieces)' and the French DJ's new collaboration with Ne-Yo and Akon titled 'Play Hard' is at 39.
Over on the album chart The xx are set to claim their first UK number one album with Coexist.
The Script's third studio album #3 is currently trailing by 6,500 copies at number two, while Bob Dylan's Tempest is at three.
Elsewhere, Joe McElderry's at nine with Here's What I Believe, David Guetta's repackage Nothing But The Beat 2.0 is at 15 and Melanie C's Stages is at 27.
Watch the music video for Amelia Lily's 'You Bring Me Joy' below: