What would Challenge Debu/Vinit

We are at the finals stage. What songs do you think would really challenge Debu and Vinit. IMO they should be given tough songs and their performance should be measured accordingly.

For Vinit it is pretty easy as he has only sung Rafi / Sonu songs. Here are 4 songs which would challenge him

1. Let;s start him off with his fav rafi singing.
O Duniya Ke Rakhwale from Baiju Bawra
2. Let him sing a manna da or hemantda song like
pucho na kaise maine rain bitayi / Yeh Raat yeh chandni phir kahan
3. A kishore song. ( Chingari Koi Bhadke or O hansini)
4. A chartbuster ( Right Here Right Now / or Rap from B&B)

For Debu selecting would be tough as he sang songs of various artists.
1. A bhupinder/gulzar combo song ( Dil Dhoondta hai)
2. A rafi/shammi song ( juglee title song)
3. A mukesh song ( Kabhi Kabhi )
4. A newer sonu song ( Kal ho na ho..)

What would be songs you would consider to be a challenge for Vinit and Debojit!!!!

Hema's Taal song(Nahin samne) would be a challenge for both of them.

Did you guys heard Laga chunari mein dag by Amey Date in II2? Vinit should attempt this song to prove himself.. I am sure HR can not sing it as well..