I just hate it when people "wish" that someone close to them go into some specific field. That should be a completely personal choice. For example, I get disgusted by blood, so I could never be a doctor...and I'm really lucky that my parents understand that. And if anyone, no matter how close to me, told me to be a doctor...I would never agree, even after that person's death.
My heart goes out to him for the loss of his ex-GF, but I can not support him in this decision. Amit Tandon has other talents so he should just take advantage of them rather than getting himself humiliated here. And if he's so determined to be a singer, then his album will make him a singer...no need for a competition.