Mariah Carey has offered to perform a private concert for one lucky couple on Valentine's Day (14Feb14) to raise money for charity. The Hero hitmaker has teamed up with celebrity charity website Prizeo.com to raise cash for St. Jude Children's Research Hospital, a U.S. organisation which supports youngsters diagnosed with cancer. The pop diva will invite the winning donor and a loved one to her home in New York, where she will perform a romantic concert for two. All those who donate will be entered into the prize draw. In a statement promoting the campaign, the star writes, "You all know that this is my favorite time of the year, and so I've decided to give back and raise some funds for the incredible St. Jude Children's Research Hospital, a cause very close to my heart as a mom. "In exchange for a small donation, you will be entered to win a trip to New York City (I'll fly you from WHEREVER you are in the world) to visit me in my home, where I will give you and a loved one your very own private concert... on Valentine's Day! I wanted to do something extra special for such a magical organization, and I thank you dearly for all of your support."