LMFAO's 'Party Rock Anthem' is expected to secure a fourth week at number one on the singles chart, while the top five remains unchanged from last Sunday.
Elsewhere in the top ten, Blue look certain to score their 12th top ten hit with their Eurovision entry 'I Can', which is currently in seventh place. The newly-reformed boyband will represent Britain at the contest in Dusseldorf on May 14.
Further down the chart, Jessie J's 'Nobody's Perfect' leaps from 18 to 13, and David Guetta, Flo Rida and Nicki Minaj's 'Where Them Girls At' lands at 14.
Wynter Gordon's 'Dirty Talk' shifts from 34 to 26, and Dev's 'Bass Down Low' debuts at number 38.
On the albums chart, Adele's 21 remains at number one, while Fleet Foxes' Helplessness Blues lands at number two.
Jennifer Lopez's comeback record Love? enters at number six, with Beastie Boys' Hot Sauce Committee Part Two a place behind at number seven.
Following her performance at the Royal Wedding, Ellie Goulding's Lights vaults from 23 to 11.
> View the current singles top 100 here