Saturday Night Live with Emma Stone as host and musical guest Kings of Leon averaged a 2.7 adults 18-49 rating in the 25 markets with local people meters and was the #1 show of the night (including primetime). That's even with the last original (2 week's ago) when Jane Lynch hosted with musical guest Kanye West.
Via NBC press notes:
“Saturday Night Live," hosted by Emma Stone with musical guest Kings of Leon, averaged a 4.5/11 in metered-market households). SNL was the #1 non-sports broadcast of the night in the metered markets, outrating all primetime entertainment programs on the English-language broadcast networks.
In the 25 markets with Local People Meters, “Saturday Night Live” averaged a 2.7 rating, 11 share in adults 18-49 and was the #1 non-sports show of the night in the Local People Meters, ahead of all primetime entertainment telecasts on the English-language broadcast networks.