Usher has made the top spot on the Billboard Hot 100 with 'OMG', clocking up his ninth number one single.

Following last week's appearance on 'American Idol', the track, which features Will.i.am, leaps from six to one, giving the R&B superstar his first number one since 2008's 'Love In This Club'. Behind Usher, B.o.B's 'Nothin' On You' slips to two, and Jay-Z's 'Young Forever' featuring Mr. Hudson climbs into the Top 10 from 12 to 10.

Elsewhere in the chart, Lady GaGa's 'Alejandro' continues to climb, jumping from last week's 20 to 16, and La Roux breaks into the top 30 with 'Bulletproof', climbing 35 to 29.

Shakira makes her debut on the chart with 'Gypsy' at 65, as does David Guetta's 'Gettin' Over You', which features Chris Willis, Fergie and LMFAO, at 95.

Five 'Glee' songs debut on the chart, the highest of which is 'One Less Bell To Answer/A House Is Not A Home' at 53, followed by their version of Christina Aguilera's 'Beautiful' at 61, 'Fire' at 64, 'A House Is Not A Home' at 70 and 'Home' at 90.

The top ten singles in full (click where possible for our reviews):

 1.    (6) 'Usher: 'OMG'
 2.    (1) B.o.B ft. Bruno Mars: 'Nothin' On You'
 3.    (2) Rihanna: 'Rude Boy'
 4.    (3) Taio Cruz ft. Ludacris: 'Break Your Heart'
 5.    (4) Lady Antebellum: 'Need You Now'
 6.    (5) Train: 'Hey, Soul Sister
 7.    (6) B.o.B ft. Haley Williams: 'Airplanes'
 8.    (8) Ke$ha: 'Your Love Is My Drug'
 9.    (7) Jason Derulo: 'In My Head'
10. (12) Jay-Z ft. Mr. Hudson: 'Young Forever'