Bad
Хиты 2014 | David Guetta & Showtek feat. Vassy Lyrics

I say why does it feel so good?
The singer is questioning why it feels good to act in a way that is considered 'bad' or inappropriate.

So good to be bad
The singer is expressing enjoyment in behaving in a way that is not normally accepted or morally correct.

Getting what I want, boy
The singer is stating that they are able to achieve their desires or goals, despite any objections or negativity from others.

Why does that make you so mad?
The artist is questioning why someone else would be upset or angry when they are able to achieve their goals.

You see, why does it feel so good?
The artist is posing the same question again, but addressing it to the listener rather than themselves.

Cause if it's trouble that you're looking for
The singer is saying that if the listener is looking for someone to cause problems or stir up trouble, then the singer is willing and able to do so.

Oh baby, here I am (I am)
The singer is presenting themselves as someone who is willing to engage in 'bad' behavior and calling attention to their availability for such activity.

I said why does it feel so good?
The artist is repeating the question from earlier, reiterating their curiosity about why it is enjoyable to act in a 'bad' manner.

So good to be bad (Bad)
The artist is reiterating their enjoyment in engaging in behavior that is not traditionally acceptable, and emphasizing this with the word 'Bad' in parentheses.