Justin Bieber added to list of VMA performers

Rapper B.o.B. also on tap for Sept. 12 awards show

NEW YORK -- Justin Bieber and B.o.B. have been added to the list of performers at this year's MTV Video Music Awards, the network announced Wednesday.

The pop star and hotshot rapper join previously announced performers Kanye West, Drake and Florence + the Machine at the VMAs, set to air Sept. 12 on MTV.

MTV also announced that Ke$ha has been tapped as a presenter at the ceremony, joining Nicki Minaj, Trey Songz, Selena Gomez and Ne-Yo. Electronic artist Deadmau5 was confirmed as the event's house DJ earlier this week.

Bieber and B.o.B. are each making their debut VMA performances at this year's ceremony. Bieber is vying for the Best New Artist award for his "Baby" clip, while B.o.B. racked up five nominations, including a Video of the Year nod for his Hayley Williams-assisted single "Airplanes."

B.o.B. told Billboard.com earlier this month that the nominations represented a milestone for him, and that he would love to perform at the awards show. "I definitely would," he said. "Why not? That's like, 'Let's party!'"