During a 'V' live broadcast on October 6, Mark talked about which song he likes the most from their new album 'Flight Log: Turbulence'!

SEE ALSO: Singer-songwriter Paul Kim to marry girlfriend of 9 years

Jinyoung asked him, "Which song do you like best on this album?" and Mark replied, "I really like 'Mayday.'"

Jinyoung then relayed a behind story with, "It was decided that Mark would do Jackson's part, but this was changed.  Originally, Jackson did the intro and the first line of rap was by Mark."

Watch the 'V' broadcast below.