© Getty US singer Katy Perry arrives for the KIIS FM's iHeartRadio Jingle Ball at the Forum Los Angeles in Inglewood, California on December 6, 2019. (Photo by Jean-Baptiste LACROIX / AFP) (Photo by JEAN-BAPTISTE LACROIX/AFP via Getty Images) Katy Perry has said that living with children during the lockdown means she is “learning to be a mum fast”.