Complex sentence: Charice sang a duet of the song "The Prayer" with Bocelli, having only met for the first time 23 May 2008 when performing at a one-night tribute concert with David Foster at the Mandalay Bay Events Center on the Las Vegas Strip.
Split into simpler sentences: Charice sang a duet of the song "The Prayer" with Bocelli. Having only met for the first time 23 May 2008 when performing at a one-night tribute concert with David Foster at the Mandalay Bay Events Center on the Las Vegas Strip.