Read the text and determine if the sentence is true:

Brett McLaughlin, known professionally as Leland, is an American singer, songwriter, record producer, composer and lecturer. Based in Los Angeles, California, he has worked closely with a range of popular artists, including Troye Sivan, Daya, Capital Cities, Andy Grammer, Hilary Duff and Allie X.

Sentence: Brett was very succesful
It's impossible to say