To be sincere, I don't follow what's happening on thein show business lately and if you ask me what areo my favorite singers are, I can give you a list, according to my knowledge of what I define as "music" and not only "noise".

A more casual way of saying 'To be sincere...' when giving an opinion is to say 'To be honest...'. A lot of us young people use that instead as 'To be sincere' sounds just a little bit formal, but it is technically correct.

It's something that just doesn't call uptch my attention.

Purely stylistic choices here, but you are not technically wrong.

But lately I have found this singer called Dua Lipa, and after listen to her famous song "Physical", I started to be curious to know more about her.

She is very young and haves great songs that makes us move our bones when we are perhaps sad and feeling blue.

Right now, I am listening to this song: https://www.youtube.com/watch?v=TUVcZfQe-Kw

As a young person of thein show business, she has a nice body and learns well how to do the choreographies well for the videos.

I hate some stupid people who opens up their mouth to say nonsenses, but she seems to be different.

I must say thait I totally agree with her statement : "Success, to me is just doing things that I'm really proud of".

In this sense, I can say that she is not mediocre and I like people like that.

She is not on my playlist yet for some reason, but I will make one with 4 or 5 songs that I like.

A useful contraction for 'is not' is 'isn't'.
This is more commonly said in day to day English speaking. 'Is not' is a little more formal, but we often use it in formal writing and speech, and to strongly express something that we do not have/like/whatever, with strong emphasis on the word 'not'

Without doubt, I can say that I like this singer of the new generation!!!!