Interesting mashup! Christina Aguilera Vs. Kat Graham Vs. Beyoncé Vs. Madonna Vs. Dev; Source
Mash Up List
• Christina Aguilera - You Lost Me (Hex Hector Mac Quayle Remix)
• Kat Graham - I Want It All
• Beyoncé - Girls (Who Run The World)
• Madonna - Get Together
• Dev ft. The Cataracs - Bass Down Low