The last time RuPaul was on "Saturday Night Live," America hadn't even impeached its second president yet. Now the country has gone three-for-three on presidential Senate acquittals, and RuPaul has graduated from the punchline to a 1993 cross-dressing sketch titled "What's That?" to a charming full-blown host whose studio audience is well-versed in his drag vocabulary. This weekend, the longtime "Drag Race" host, both in and out of drag, joined musical guest Justin Bieber to give the "SNL" episode a throwback feel, including a Bop It sketch, that was only overshadowed by Shadow Inc. and the disastrous Democratic caucuses in Iowa.