After nearly every song in her NBC concert special, an expression of relief washed over Adele’s face, as though the only thought inside her head was, “I got through that one. Whew.”.

Adele said in her broad North London accent after opening the concert, filmed last month at New York’s Radio City Music Hall, with “Hello.” “I was trying to find the nearest exit before I came down. I haven’t done a show for like four years!”.

A key second-wave component in the careful rollout of the singer’s blockbuster album “25,” “Adele Live in New York City” aired just hours after she announced she’ll tour North America next summer, with a whopping six dates scheduled for Staples Center in Los Angeles.

The scale of Adele’s success – so far, “25” has sold more than 5 million copies – makes her an outlier, even by the standards seemingly set by other megastars such as Taylor Swift.

Assuming the Radio City concert is in line with what she’ll take on the road, Adele’s tour might be the least complicated superstar production in recent memory.

Actually, Adele did do a bit of dancing in “Skyfall,” moving her hips ever so slightly to the James Bond theme’s stormy groove.

Mostly the concert showed us someone singing: low and dusky in “Million Years Ago,” high and tender in “All I Ask,” fierce and commanding in “Set Fire to the Rain.” For “When We Were Young,” the camera zoomed in close on Adele’s face as she chewed through lines about fearing the prospect of getting old, a characteristically relatable idea that drove the crowd to a standing ovation when the song was over.