The Portuguese youngster, signed from Fulham this summer, has earned 'nickname' Bruno Mars.
"We had a few days where we went for food at the restaurant and then there was the initiation with the songs for the new lads which brought us closer, especially for me as I had to sing and so the lads were just laughing and joking," Carvalho told the club's website.
He continued, "Things like that just bring the group together, even the young players who came with us as well. It just brings everyone closer.
"When I first came my nickname from the lads was Bruno Mars, which I've now said no to! So to stick to that little joke, though, I sang Bruno Mars' The Lazy Song. It was alright!"