Sometimes do आप feel like someone is lying to आप when they tell you, आप can sang?

It depends on the person.
Some people think आप sing good because they like the style of संगीत आप sing. Some think आप sing horribly, depending on the संगीत taste. It's like Justin Bieber. Some people think he sing well and some people think he sounds like a little girl.
So sometimes I feel like they're lying and sometimes I don't. For me, it's the person (:

Yes, because आप want the truth not what the kindness itself gives. Its good to be kind but the truth must speak, या else आप could get hurt या embaressed.

depends on the person u r talking to.............Everyone hs his own taste........So basically some ppl think u can b a singer one day....and sm dnt like ur singing.......