Prank Call Gone wrong

You and Your friend were playing truth or dare and you chose dare, she said to call a random stranger and sing Santa baby naughty ver, by Ariana grande.. not knowing it's your crush Niki's phone number!

So there.. you called a random number typing on the num pad, then the person started to sing, the voice was familiar but you ignored it. "Uhm...hello..? Who's this..?" The unknown person or should I saw Niki asked so you started to sing some lyrics from the song