*Usher has just scored his ninth No. 1 single on the Billboard Hot 100 with “OMG,” his latest single from the album “Raymond v. Raymond.”

The track, which features vocals by will.i.am, lifts from No. 6 to No. 1 in its fifth week on the chart.

Usher first reached No. 1 in 1998 with the single “Nice & Slow.” No other artist has outpaced his production of No. 1s in that time period. Mariah Carey and Rihanna have the second-most chart-toppers in that span with six each.

Usher last held the No. 1 spot for three weeks in March 2008 with “Love in This Club,” featuring Young Jeezy.

In other Ursh news…

Jermaine Dupri, who executive produced Usher’s 2004 album “Confessions,” has responded to the singer’s accusations that Dupri snubbed him when it was time to record “Raymond v. Raymond.”

“I didn’t really want to be executive producer of Usher’s projects after ‘Confessions’,” Dupri told Vibe. “You sold more records than any other artist in this decade based on that album and now I have to ask Usher, ‘Am I the executive producer of your next album?’ That seems disrespectful to me.

“As a producer, it’s kind of hard for me to go back into people’s projects when I gave you your biggest album ever. …I don’t feel like I’m supposed to ask to produce anymore. People are supposed to come to me and tell me that I’m the executive producer. That’s why I get more kicks working with younger artists.”

Despite his comments, Dupri co-wrote the track “Foolin’ Around” on “Raymond v. Raymond.”