She arrived in a long black coat, worn over slinky satin dress with numerous cream beaded necklaces around her neck – typical of the 1920s style.
She topped off her outfit with a classic felt hat and gloves.
During the event, mum-of-one Janet was reunited with Professor Tiong Ghee Teoh – the doctor who delivered her baby three years ago.
He is a professor of obstetric practice at Imperial College London and researches prematurity.
The US singer shares her only son Eissa, who was born in January 2017, with her ex husband Wissam Al Mana, 45.
source: express.co.uk