I think these tracks will be ideal for Janet:

Beat Of My Drum (by Nicola Roberts) - with a "Janet dance break" in the middle
Work (by Ciara) - a perfect song for Janet
Devotion (by Electrik Red) - Sexy Janet part 1
So Good (by Electrik Red) - Sexy Janet part 2
W.F.Y. (by Electrik Red) - Sexy Janet part 3
Motivation (by Kelly Rowland) - Sexy Janet part 4
Big Fat Bass (by Britney Spears) - Dance Janet
Do It Like A Dude (by Jessie J) - like an updated "You" from the Velvet Rope
Just Can't Get Enough (by The Black Eyed Peas) - a pop dance ballad hybrid
Criminal Intent (by Robyn) - urban sounding
Together Again (2012 Version) - Maybe MJ related
*A new song with Missy Elliott

What do you guys think?

Any more song suggestions?