Maria Kirilenko was always subnamed " Baby-Sharapova" not because they are so look-alike
but because they both are beautiful and charming and russian and friends and often seen together.
And as we know Masha is high and Makiri about only a half of her and so the name " Baby-Sharapova" was born.
And Maria Kirilenkos father is also named Yuri and on tour with her.