Donny Osmond superfan loses it when the star surprises her

Although she's been one of Donny Osmond's biggest fans since childhood, Margaret, now 50, never had enough money to actually meet her idol in person.

Click through to see her put the 'down' in meltdown ...

Hoping to finally make the meet-and-greet happen, Margaret's childhood friend, Toni, who says she's known Margaret "since diapers," shared Margaret's story with the team at "Rachael Ray." Together, they were able to pull off an emotional surprise decades in the making.

Of course, to make the moment truly a surprise, Margaret -- who has never owned a brand-new piece of furniture in her life -- was told she was coming on the show to get a few design tips from HGTV's John Gidding.

During the segment, Donny makes an appearance on video to tell Margaret he's sending her items from his brand-new line, Donny Osmond Home. Margaret's reaction is undoubtedly happy -- but nothing compared to the moment she finds out that Donny was hiding in the studio all along.

And the rest is TV history.