Live 8's centerpiece was always intended to be the London concert in Hyde Park, with a mammoth parade of superstar acts and big-time reunions. The epic concert opened, as expected, with Sir Paul McCartney and U2 teaming up for a performance of "Sgt. Pepper's Lonely Hearts Club Band," with a horn section dressed in the classic Sgt. Pepper garb.

U2 was one of many bands (along with R.E.M. and Coldplay) who already had gigs booked elsewhere that evening, so they played early on, with a three song set consisting of "Beautiful Day," "Vertigo" and "One," the song that the African relief campaign takes its name from. A rumored collaboration came true, as Richard Ashcroft, former frontman of The Verve, joined Coldplay on stage for a performance of his band's biggest hit, "Bitter Sweet Symphony."  Coldplay also performed "In My Place" and "Fix You," as Chris Martin proclaimed Live 8 founder Sir Bob Geldof a "hero of our times."

Later on, controversial, ex-Libertines member Pete Doherty joined Elton John on a rendition of the T-Rex tune, "Children Of The Revolution." One of the emotional highlights of the day came during Madonna's set, when Geldof brought a young, African woman on-stage, who had been near-death in 1985, but had been saved by funds raised at the original Live Aid. Madonna opened her set with "Like A Prayer," backed by a full choir.

The Who reunited once again for the occasion, Geldof himself performed his Boomtown Rats classic "I Don't Like Mondays," backed by Travis, who played their own set as well. Mariah Carey performed "Make It Happen" alongside the African Children's Choir, with her old friend, American Idol judge Randy Jackson playing bass.

The biggest reunion of the night came in the form of Pink Floyd, back together with bassist Roger Waters for the first time in over 20 years. The legendary British band played four songs, including "Money" and "Wish You Were Here," which was dedicated to their former singer Syd Barrett.

The show was capped off with the return of McCartney, closing out the night with a number of Beatles classics. Performers from throughout the day returned to the stage for the sing-along grand finale of "Hey Jude." The concert wrapped up over two hours after it was expected to.

For FMQB.com's online blog of the Philadelphia event, including exclusive photos from throughout the weekend, click here.