A 74-year-old woman got to check something off her bucket list: a "once in a lifetime" concert experience.

Marylin McLean always wanted to go to a major concert. Approximately one year ago, she told her 13-year-old granddaughter Cayleigh Pratt that her biggest regret in life was that she'd never been to a show with screaming crowds and an electric atmosphere.

She said she'd been too old to get swept up in "Beatlemania," and she'd never been into Elvis, so she'd missed opportunities when she was a teenager.

So Pratt started to save, aiming to buy a $100 One Direction ticket for her grandmother.

"I like to babysit, so instead of using money on things for myself, like clothes or whatever, I saved it up," she told CTV Toronto.

Pratt saved up enough to buy two tickets, and told her grandmother they'd be going to the boy band's show in Toronto.

"She phones me up and says: 'Nana, your wish is going to be granted. You're going to see One Direction and you'll love it,'" McLean said, speaking just before Thursday’s concert.

"I was blown away that she would go to that bother, knowing that that's something I really wanted. How sweet is that?"

Pratt's mother was touched by the gesture, and bought tickets for herself and one of Pratt's cousins so that three generations of women got to experience the show together.

With a report from CTV Toronto's Ben Mercer