There are two artists on last.fm with this name:
These are videos from concerts where Belly played, so they may be of other bands that played the concert as well.
Boston Calling May 25 - 27, 2018 Boston, Massachusetts, United States Added by Craig Mac
The Weeknd / Rae Sremmurd / Belly / 6LACK May 2, 2017 Phoenix, Arizona, United States Added by Concert Archives 3
R.E.M. / Magnapop / Belly / Blur Jul 29, 1995 Milton Keynes, England, United Kingdom Added by Poppydog