After releasing his second mini-album earlier today, K-Will held his comeback showcase for "My Heart Is Beating" on the afternoon of March 10th, and officially kick-started his comeback promotions. K-Will performed the new tracks off�his album, and later revealed the full music video for the first of his double title tracks, "My Heart Is Beating". Since the MV features the acting talents of IU and MBLAQ's Lee Joon, he was asked about how it felt to work with Korea's national 'little sister'. He replied,�"It's difficult to explain through words.�I'm sure you all felt it through the music video, but she's very cute and pretty, and also great at acting.�People call her the current trend of the industry, which I'm sure the men know very well and the women acknowledge.�I wasn't able to take my eyes off of her acting." He brought out laughter from the crowd by adding as an afterthought, "It really is hard to express in words.�Such a happy moment for me." Fellow labelmates, SISTAR was also in attendance to show their support. [gallery] Source: Star News via Nate