Los Angeles: R&B Singer Beyonce has wrote an open letter to the US' First Lady, Michelle Obama, thanking her for fostering a positive environment for black women.

According to a website, in the letter whose copy is with GlobalGrind.com, Beyonce wrote Michelle is the ultimate example of a truly strong African American women. "She is a caring mother, she's a loving wife, while at the same time, she is the First Lady," it said.

"No matter the pressure, and the stress of being under the microscope - she's humble, loving and sincere....She builds and nurtures her family, while also looking out for so many millions in so many ways."

"Michelle, thank you so much for every single thing that u (sic) do for us - I am proud to have my daughter grow up in (a) world where she has people like you to look up to," read the letter.

(Agencies)