Both of them are very strong contenders dominating the Top 2 for at least 1 or 2 months, both have airplay and AI gaining massively without much promo and with no music video
i'm surprised TMO has not yet a music video the song got old quite fast for me, but anyway guetta and nicki deserve to get another hit with this!
When's the last time a Glee cover made it to the top 10? If the Adele mashup couldn't... Glee doesn't have the same pull as before. It wil definitely help the songs they are covering...but the covers themselves?
ETA: Nevermind I just realized you meant iTunes top 10 not BB100 top 10.