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Lisa Marie Presley just sent a "thank you" bouquet to the florist that decorated Michael Jackson's tomb with sunflowers -- because if there's one thing a florist needs, it's thêm flowers.

TMZ has learned Presley sent the hoa to sunflowerguy.com -- along with a personalized card that said, "Thank bạn so much for donating the beautiful flowers."

As we previously reported, the florist sent thêm than 1,500 sunflowers to Forest Lawn Cemetery on Friday , after Lisa Marie begged MJ's những người hâm mộ to do a better job of decorating Michael's tomb.