Mariah Carey takes over London Underground's intercom

Michael Loccisano/FilmMagic

Mariah Carey is helping London Underground’s commuters to feel a bit more festive on their travels by taking over the system’s intercom.

The Grammy winner revealed on Wednesday that she has teamed with Amazon Music UK to take over the transit system’s speakers to make sure travelers stay safe and “stand behind the yellow line.”  

In a post on her social media sites, Mariah said she aims to “bring some festive cheer to the London Underground” with her new partnership, and wishes everyone using the transit system “Safe travels!!”  She also shared a clip of her new greeting for passengers on London Tube lines.  Unfortunately, she does not tell