This clip comes from an interview with Madonna, that took part a month ago, from a French radio station (probably NRJ).
It sounds that she likes Rihanna's single 'Don't Stop The Music' a lot.
If you remember, Rihanna was the first performer at Madonna & Gucci's fundrasing event 'Night to benefit Raising Malawi'. The song that she performed first was actually 'Don't Stop The Music'.

In this clip, Madonna sings a very short part of lyrics and says:

"Please don't stop the music. Yeah, this sounds like a song I wrote (similarities with La Isla Bonita). I could've written it, I could've written it!"