The band had their big breakthrough with the hit song "You get what you give" in 1998, but they split only a few months later.
During Biden's election campaign last year, "You get what you give" was played extensively - and now the authors will gather to perform it live at the "virtual parade" that takes place after the installation.
"If there is one thing on earth that could make us gather the band, if only for a day, it is the hope that our song could shed a little light in these dark times," says New Radicals frontman Gregg Alexander in a statement.