Luke Bryan is a/an SingerSinger has example: Taylor SwiftTaylor Swift : `~Artist`: Speak Now
[Human]: I like Luke Bryan. Do you know about him? [Assistant]:  Luke Bryan is a Musician and singer- songwriter.   [Human]: I think he is a great singer. Another singer I like is Taylor Swift. Do you know any songs by her? 
Yes, Taylor Swift composed Old Town Road and Shape of You.