The 'Easy On Me' hitmaker grew more and more emotional as she walked through the audience at her Las Vegas residency show at The Colosseum At Caesars Palace.
Adele has been opening up to fans while on stage in Vegas. She wept this month as she spoke about the importance of having good friends "when relationships fall apart".
Adele has appeared as a host on Saturday Night Live, joking about her weight loss and explaining to fans why her next album is unfinished.
The disc "21” was released in 2011 and has sold an estimated 31 million copies worldwide. The album "25” came out in 2015, and sold 22 million copies.
British soul diva Adele has released a comeback single "Easy On Me" on Friday, in which she shares with the world details of the traumatic six years she has endured since the last release of a record.
According to Adele, one of the main reasons that she, her ex-husband and their son relocated to Los Angeles was to improve their quality of life.
The news of the live shows comes as Adele prepares to release her fourth studio album 30.
The music superstar, 33, was surprised by Ms McDonald, from Chestnut Grove School in Balham, who taught her before she moved to the prestigious Brit School as a teenager.
Few things elicit eyeroll championships more than extremely rich women talking about the juggle of a career and motherhood. “Oh c’mon! You must have an army of nannies! All that money and your kid in a golden cot — shurrup.