Brooklyn School Principal Drops Justin Bieber's 'Baby' From Graduation Ceremony

First, Lee Greenwood; now, Justin Bieber.

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Greta Hawkins, principal at Brooklyn's Edna Cohen School, drew outrage from Greenwood -- writer of "God Bless the USA" after news broke that she was preventing kindergartners from singing the patriotic anthem at their graduation, even though they'd spent months learning the song.

At the same time, Hawkins drew flak for keeping Justin Bieber's "Baby" in the lineup.

According to the New York Post, citing New York City Mayor Michael Bloomberg, Hawkins has nixed the bubblegum pop hit after deeming it inappropriate for 5-year-olds.

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"The principal has decided she’s not going to sing that song. It’s the principal’s decision, and we support the principals," Bloomberg said Monday in a press conference.

Meanwhile, "Baby" joins "God Bless the USA" on the Do Not Sing List.

“I wrote 'God Bless the USA' about the love I have for this country and the struggle we have gone through to remain free," Greenwood complained through his public-relations firm, Webster & Associates.

“Our country was founded on the principle that it welcomes people of all cultures and gives them the same rights we have as citizens. However, I feel compelled to echo the faith of our forefathers who all believed in God and a respect of a higher authority. Personally, denying the children of PS 90 to sing 'God Bless the USA' offends me as a Christian. My song is about hope, faith, spirit and pride. How could that be wrong on any level?”