Coldplay singer Chris Martin helps drive woman to Big Weekend
During the journey she asked about the BBC Three Counties Radio campaign to change the lyrics of Yellow to Orange to which he promised "a good surprise".
Later that night the band did not rework the song but instead delivered a performance new track called "Orange", written the previous night by Martin to honour Luton and its football club.
Martin told her about their rehearsal and that he liked Luton. In response, Ms Glenn recommended Luton business Chicken George and told him how she has lived longer than both of her parents.
"He said 'you're not going anywhere yet', I was clutching his shoulder and having a chat like two old women," she said.
Ms Glenn described Radio 1's Big Weekend as "The coolest festival I've been to" and praised Coldplay for their song about Luton Town Football Club.
She beamed: "I met Chris Martin and had a conversation with him and he's such a nice man!"