Yeah, looks like Top 10 for "Alejandro" before Idol is not happening. But I'm glad it's only because of competition, the song is actually climbing fast.
But there are still around 24 more hours until the performance so there's still a chance. It can happen like this - Alejandro passes Need You Now - the Glee songs kicks B.o.B. off the Top 10 - Alejandro passes B.o.B. - and then passes Glee and becomes #10.