'Demi Lovato: Dancing With The Devil' will make its world premiere and kick off the 2021 online event, which runs March 16-20.
The line-up includes performances by Jessie Reyez, Finneas, Kesha, Girlpool, TOKiMONSTA, Brian Fallon and more surprise guests.
The band say that once tickets go on sale a portion of proceeds will help people whose services industry jobs are impacted by the pandemic.
The live showcase on 22 March is for bands that were due to perform at the cancelled festival.
Additionally, Michael Moore will interview Pink Floyd’s Roger Waters while Ozzy Osbourne and son Jack will appear in conversation with comedian Jim Norton.
Now in its 32nd year, the annual convergence of bands, BBQ and beer known as (SXSW) has descended upon Austin, Texas, here's a primer of acts to watch.