Listen to MC's Act Like They Don't Know online. MC's Act Like They Don't Know is an English language song and is sung by Krs-One. MC's Act Like They Don't Know, from the album Hip Hop 100 Hits - Urban rap & R n B anthems inc. Jay Z, A$ap Rocky, Wu-Tang Clan & Nas, was released in the year 2013. The duration of the song is 4:55. Download English songs online from JioSaavn.