About a month ago, U2 sound-checked "Two Hearts Beat as One," a song they haven't played live since the Dublin's Point debut in December 1989. Fans have impatiently awaited the moment they'd dust off the song for a live version and at Monday night's Madison Square Garden gig, the wondering was put to an end.

The sixth show of U2's MSG residency boasted the War classic early on in the set. "We're a band from the North Side of Dublin called the U2," Bono said as Adam Clayton initiated the song. "This is a song we haven't played in a quarter of a century."

Bono became aware of the undying desire fans had to hear the song live and those lucky ones in New York City got an unforgettable performance. "Oh yeah," he said as the song ended. "Ya happy?" And it just got better from there. As the show progressed, a Chilean fan named Ignacio was invited up on stage to man the guitar on "Angel of Harlem," giving the fan the instrument for safe keeping, as reported by Rolling Stone.

The concert featured "The Troubles" for its third live performance, a song from the group's latest LP, Songs of Innocence. Although the set list included "I Still Haven't Found What I'm Looking For," the band chose to execute "One" instead. Bono continuously attempts inciting crowd sing-alongs but although he requests the fans refrain from clapping, they always slip-up and throw off the rhythm.

"I'm not a fussy rock star," Bono said. "Just picky." After re-launching the song twice, the fans at MSG buckled down, prevented from clapping and belted out the song.

Previously on their string of gigs, U2 has brought out special guests Jimmy Fallon and the Roots as well as Lady Gaga on separate occasions. Other songs were resurrected for the tour such as the 1980 tracks "October" and "Gloria." According to Entertainment Weekly, U2 will complete their final two shows at the famous New York City venue on Thursday and Friday.

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