JYJ's Junsu is all smiles behind the scenes of his showcase for 'XIGNATURE'.

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On June 1, C-JeS Entertainment revealed previously unseen photos of the star preparing for the showcase, held on May 30, for his 4th solo album. Junsu rocked the 3000 fans who showed up to see his comeback with "Rock the World", and it looks like he had an amazing time as well.

In other news, Junsu will be holding his '2016 XIA 5th Asia Tour Concert in Seoul' at Seoul's Olympic Park on June 11-12.

Check out the photos below!