Other productions comparable to 'Usa for Africa' ?

Concerning the past musical production, or whatever else you'd call it, 'USA for Africa' (i.e., with Michael Jackson, Lionel Richie, Springstein, et al), do you know of any other production(s) that put on display such a colossal amount of top talent all at once ? Besides the good cause it served, 'USA for Africa', as a muscial performance, would seem to have been the 'dream team' of commercially successful vocalists all putting their singing talent together in a rare emblage of such talent. Has there ever been any other production of comparable combination of talent?