Watch Ariana Grande Perform With Surprise Guest At 2015 NBA All-Star Game [TV Channel, Live Stream Info]

Pop singer Ariana Grande is set to perform at halftime of the 2015 NBA All-Star Game at Madison Square Garden on Sunday. The Florida native will reportedly be performing with a surprise guest at the annual basketball event. Nicki Minaj, who has been spotted during much of the festivities of All-Star Weekend has been speculated as a possible guest performer. Rihanna was also seen during the event.