There is more than one artist with this name:

1) Shelly are a lo-fi dream pop band. It consists of singer-songwriters Clairo, Claud and their friends Josh Mehling and Noa Frances Getzug.

2) Shelly is a female singer from Indonesia.
She covered Opick’s song Bila Waktu T’lah Berakhir in the album Senandung Ramadhan.

3) Shelly are a lofi pop-rock band from Michigan, USA. For fans of The Shins, Empire! Empire! (i was a lonely estate), and Alex G.

4. Shelly are a punk band from Brooklyn, formerly known as Scout.