DETROIT, MI - Judith Wollack kept secret for more than two years the source of high profile charitable donations made to her children's charity headquartered on Detroit's east side.

Now this Wolverine Human Services CEO can tell the world how much gratitude the organization has for Eminem and his effort to give more than 1,200 needy Michigan children a memorable holiday season.

Eminem is expected to help at least 420 more children this year, and has, along with his Marshall Mathers Foundation, spent at least $200,000 to purchase presents for the children in the two-year span, Wollack said.

"I think Michiganders and Detroiters all love where we live and support what we do to bring out the best in our people and our cities," said Wollack, who estimates that Eminem gave at least $105,000 to the charity in the first year. "We're absolutely blown away by the support he's given."

News of Eminem being an anonymous donor of the charity for at-risk youth ages 12 to 18 from 54 Michigan counties comes at a time when a Slim Shady-backed online fundraising effort to support Wolverine Human Services is gaining steam.

By 11:30 a.m. Tuesday, more than $34,036 was raised for the charity. Eminem plans to match all donations up to $100,000 made by the time the fundraiser ends at 11:59 p.m. Tuesday and allowed Wolverine Human Services to go public with his involvement just two weeks ago.

Visit the crowdrise.com website to make a donation.

Messages from Eminem sent Tuesday morning via his Twitter page:

Wollack admits it was extremely hard to not break Eminem's anonymity as a donor, but knows Wolverine Human Services willingness to respect the rapper's privacy likely played a major rule in building a relationship with celebrity and his Shady Records team.

"Oh yes, oh yes!" said Wollack, when asked if it was tough to keep the secret. "Of course is was! Of course you wanted to tell people, but we didn't!"

Eminem grew up in Warren and Detroit, lives in the northern Oakland County suburb of Rochester Hills, and spent several years honing his rap skills on the city's easy side, just a few miles from where Wolverine Human Services is headquartered.

"I think because we are supporting his neighborhoods, he sees the value of helping young children, at-risk children," said Wollack of Eminem's involved with the organization." And, to be honest, I think he really respects the fact we honored him being an anonymous donor for so long."

More about the fundraising campaign from the website:

Marshall Mathers Foundation has agreed to match all donations up to $100,000 to Wolverine Human Services on December 3rd #GivingTuesday.

We've created a "Pre #GivingTuesday Campaign" to get the money flowing! Our goal is to raise at least 50k before December 3rd. Remember, Marshall Mathers Foundation will match all #givingtuesday donations! So, we need your help today!

For more about Wolverine Human Services and what it does for Michigan's children in need, check out the YouTube video below.

Wolverine Human Services has offices in Detroit, Warren, Flint, Saginaw and Vassar

and Taylor. Most of the children it serves come from Detroit, surrounding Wayne County communities and areas of Oakland County.

Eminem spent part of his childhood on Detroit's east side in a bungalow-style home at 19946 Dresden. That home sat on street that had, as of last month, at least 70 vacant residential structures and was torn down Nov. 20 by the Michigan Land Back because it posed a safety hazard.

An image of the Dresden home is is the cover art for Eminem's new "The Marshall Mathers LP 2" album that was was released on Nov. 5. The home was also the cover art for his "The Marshall Mathers LP" album released in 2000.