jess glynne
The couple made their first joint public appearance over the weekend at a Brit Awards party.
The Hold My Hand singer and former Lioness were first reported to be an item last year.
"The language I used was unacceptable," she told her Instagram followers.
The Hold My Hand singer has sparked controversy following an appearance on Mo Gilligan's podcast.
Mariah's All I Want For Christmas Is You topped the UK charts for the first time in 26 years this month.
The singer claimed the intention behind her divisive Instagram comment was so the Sexy Fish restaurant staff could "better themselves".
The Hold My Hand singer has said she was turned away from a fancy London restaurant because she was wearing a hoodie, baseball cap and trainers.
The chart-topping singer has said she has "unfinished business" with the festival.
Hanson, Amanda Holden and Jess Glynne are also among those who have popped up in Erinsborough over the last 37 years.
The singer has knocked Adele off the top of Heat magazine's Rich List.