There are multiple artists with this name.

1. Sis is a project led by Berkeley, CA, United States-based multi-instrumentalist and vocalist, Jenny Gillespie Mason.

2. SiS is a B-Pop girl group.

3. SIS is Burak Sar, a techno/house artist.

4. Sis is a Bulgarian R&B/soul singer.

5. Sis is a Turkish hip-hop act.

6. Sis is a Turkish rock act.

7. Sis is a Japanese industrial/psychedelic rock act.

8. Sis is a Chinese girl group formed from the top 3 contestants in the singing show The Chosen One 3.

9. SIS is a Polish rock band from Bielsko Biala.