Leighton Meester recently teamed up with 19-year-old blood cancer survivor, Kerri Mullen to create a PSA for DKMS, urging people to join the fight against blood cancer.
Leighton Meester recently teamed up with 19-year-old blood cancer survivor, Kerri Mullen to create a PSA for DKMS, urging people to join the fight against blood cancer.