Natalie La Rose is well on her way to scoring her first UK No.1 this Sundaybut she's got to keep ahead of Jason Derulo if she wants the glory.

'Somebody' Ft. Jeremih currently leads this week's 'Official Chart Update' ahead of Derulo's 'Want To Want Me' which slips to No.2 by just 5,000 chart sales so far.

Elsewhere in the midweek update,OMI falls one place to No.3 with 'Cheerleader (Felix Jaehn Remix)' whilethis week's highest new entry at No.4 sees the return ofLawsonwith their brand new single 'Roads'.

Taylor Swift holds firm at No.5 with 'Bad Blood' Ft. Kendrick Lamar and down three to No.6 are Skrillex & Diplo with'Where Are U Now' Ft. Justin Bieber.

Staying put at No.7 is Diplo once again with Major Lazer & DJ Snake's 'Lean On', as are DJ duoGalantis, who hold firm at No.8 this week with 'Runaway (U & I)'.

Rounding off this week's update;Wiz Khalifa falls five places to No.9 with 'See You Again' and LunchMoney Lewis slips four to No.10 with 'Bills'.

'Chart information © Official Charts Company 2015.'

Find out if Natalie keeps her lead this Sunday by following @MTVMusicUK on Twitter.