The music world is mourning the loss of country legend Toby Keith after he lost his battle with stomach cancer at 62. RadarOnline.com can exclusively reveal that the chart-topping performer is continuing to help others and pay it forward in the wake of his passing. Keith’s beloved charity project has received “thousands” of donations in honor of the singer within a matter of days, as his 16-year-old hits collection simultaneously tops the Billboard Album Chart. Instead of flowers, the family asked fans to send donations to The Toby Keith Foundation, which encourages the health and happiness of…