Gigi d'Agostino is an italian producer/DJ. He released the single "L'Amour Toujours" in 2000. I think it is better known as "I'll fly with you", since that title would have coincided more with the lyrics... I remember how I hunted for the song some years ago without knowing either the artist or the track.
LMC released the track take me to the clouds above in 2004. I guess from the beginning it was a mashup between Whitney Houston's "How will i know" and U2's "With our without you", with u2s song together with some new instruments (drums etc.) providing the backingtrack for a part of Whitney Houstons track. However, I guess through legal issues, the song was released with Whitney Houstons vocals sung by another singer, called Rachel McFarlane. I think that technically makes the song a cover or something, it was relased with the artist credited as "LMC vs U2".
Here's my mash of the mash!

LMC vs U2, vs Gigi d'Agostino - I'll fly to the clouds above