There are multiple artists with this name. 1) SiS is a B-Pop girgroup. 2) SIS is Burak Sar, a techno/house artist. 3) Sis is a Bulgarian R&B/soul singer. 4) Sis is a Turkish hip-hop act. 5) Sis is a Turkish rock act. 6) Sis is a Japanese industrial/psychedelic rock act. 7) sis is a Chinese girl group formed from the top 3 contestants in the singing show The Chosen One 3. 8) SIS is a Polish rock band from Bielsko Biala.