Adele cut a low profile as she wrapped a Burberry scarf around her head while she stepped out of Il Bolognese restaurant in Rome on Saturday.
The singer, 37, was spotted waiting for her limousine curbside as she braved the cold in a black trench coat.
She layered her coat over a pair of flared blue jeans, a white jumper and a pair of white trainers.
Keeping a low profile in the Italian capital, Adele completed her ensemble with a black cap and a black leather crossbody bag.
Her outing comes after it was announced that the singer's 2011 record, 21, has overtaken Whitney Houston's The Bodyguard in 1992.
Adele has shifted a staggering 56.375 million, surpassing the record held by the late Whitney, who had sales of 56.372 million, reports The Sun.
Adele, 37. cut a low profile as she wrapped a Burberry scarf around her head while she stepped out of Il Bolognese restaurant in Rome on Saturday
The singer was spotted waiting for her limousine curbside as she braved the cold in a black trench coat and flared blue jeans
21 was the album that launched Adele to international renown and success, with the majority of the tracks becoming household names.
Songs featured on the record include Turning Tables, Rumour Has It and Someone Like You.
Meanwhile, Whitney's album, the soundtrack to The Bodyguard had several of her most iconic hits including; I Will Always Love You, I Have Nothing, I'm Every Woman and Run To You.
One-Republic singer Ryan Tedder, who co-wrote and produced Rumour Has It and co-wrote Turning Tables for 21, took to Instagram to celebrate the milestone.
He wrote: 'I think it's safe to say that NONE of us involved in this album, including Adele, truly realised what we were a part of during "21".
'We were just having the best time and sprinting like mad to keep up with Adele's pace and get the music finished.
'The sound was so different from popular music at that time, we didn't even know if there were legit "hits" on the album to be honest.
'Only that we loved these songs more than anything and were fully aware we were working with one of the greatest singers to ever step behind a microphone.'
Her outing comes after it was announced that the singer's 2011 record, 21, has overtaken Whitney Houston's The Bodyguard in 1992
Adele has shifted a staggering 56.375 million, surpassing the record held by the late Whitney, who had sales of 56.372 million
'Breaking this record is madness. The Bodyguard is one of my all-time favorite albums and Whitney...no words.
'Records are meant to be broken but until the next one passes us - muchas gracias. Viva la música'.
The figures were measured by the Commensurate Sales to Popularity Concept which compares albums, singles, streams and downloads to create equivalent album sales figures.
It aims to make comparisons between artists from different times (e.g., vinyl era vs. streaming era) meaningful.