Demi Lovato has defended her controversial new single, which takes aim at President Donald Trump, admitting she doesn’t care if it derails her career.The singer teamed up with Billie Eilish’s brother, Finneas, to record ‘Commander In Chief’, which she released on Tuesday and performed at the Billboard Music Awards on Wednesday evening.Taking aim at Trump on the politically-charged track, Lovato sings: “We’re in a state of crisis, people are dying.