① Music = About technical, 'Mr.Mr.' isn't a song of R&B. It's more of a dance song with a mixture of R&B. The only thing that 'The Underdogs' did was to link Soshi's song with a flavor of R&B. It will be an easier and easy digest song than last year's 'I Got A Boy'. Obviously, they never forget of adding unique lyrics as well as addictive melodies.