Watch: Paul McCartney sing 'Birthday' to Jimmy Fallon
YouTube/Maggie Clarke

Paul McCartney continued the second U.S. leg of his hugely successful One On One Tour with the first show of a two-night on Sept. 19 in Brooklyn, New York, at Barclays Center. The iconic British rocker delighted fans with a massive hit-filled 40-song setlist, which included a special birthday surprise for “Tonight Show” host Jimmy Fallon.

Billboard reports on Sept. 20 that the two-time Rock and Roll Hall of Famer delighted the former “Saturday Night Live” star by wishing him a happy birthday midway through the show's lengthy eight-song encore. Macca spotted Fallon sitting up front on the floor with wife Nancy Juvonen along with SNL producer Lorne Michaels and performed a cover of The Beatles' White Album classic “Birthday” in the comedian's honor.

Fans can check out the performance courtesy of fan-shot footage above, posted on Tuesday at YouTube. In the 3:56 minute clip, Macca and company rock through a sizzling version of “Birthday,” followed by a traditional chorus of “Happy Birthday” and cameras capture Fallon's overjoyed reaction on the LED screen near the end of the clip as he bows to Sir Paul and waves to fans in gratitude.

The ex-Beatle launched his current fall romp with a two-night stand Sept. 11 and Sept. 12 in Newark, New Jersey, at Prudential Center. The 21-time Grammy winner will perform the final show of  up his two-night stand in Brooklyn on Sept. 21 at Barclays Center. Get your tickets now at AXS.

The U.S. trek will wrap up with a two- night stand Oct. 1 – Oct. 2 in Detroit at Little Caesars Arena, followed by a tour of South America, which launches Oct. 13 in Porto Alegre, Brazil, at Beira-Rio Stadium and wrap ups Oct. 24 in Medellin, Colombia, at Estadio Atanasio Girardot. The “Hey Jude” hitmaker will wrap up 2017 with a tour of Australia and New Zealand, starting Dec. 2 in Perth, Australia, at NIB Stadium and finish the touring year on Dec. 16 in Auckland, New Zealand, at Mount Smart Stadium. For all the latest details on Paul McCartney, click here.