The classic rock icon Paul McCartney has been performing impromptu concerts as a publicity stunt to promote his new upcoming album appropriately titled, "New." On Thursday afternoon, after performing a special show the day before, he held to have guerrilla concert in New York City's Times Square.

On Wednesday, McCartney played a full 13-song set as part of his promotion, and conducted a master class Q&A session with 400 students at the Frank Sinatra School of the Arts in Astoria, Queens, which was founded by singer Tony Bennett, who attended the performance, as well.

The legendary Beatle announced that he was going to perform in Times Square on his Twitter, an hour before the hit-and-run show. "Wow! Really excited to be playing New York Times Square at 1 p.m. this afternoon!" the singer tweeted. "Come on down to Times Square. It's going to be happening there!"

The stage was set up at 46th Street and Broadway. A crowd of fans gathered to hear McCartney sing. The Beatle appeared with his usual four-man band and performed four songs from his upcoming album "New," including punk-rock tune "Save Us" and the sing-along "Everybody Out There." The 15-minute surprise show was very enjoyable to the packed audience.

"You're a lovely audience. Let's do this the same time tomorrow - just kidding," McCartney said as he successfully ended the mini-show.

"New" is Paul McCartney's first album of new original songs in 6 years. The album features 12 tracks including "New" and "Queenie Eye," and it is set to release in the United States on October 15.