Sheryl Crow spent yesterday on the beach in Hawaii with her kids Levi and Wyatt, and boyfriend Doyle Bramhall II. Sheryl wore a bikini while splashing around in the ocean with her boys and chatting with friends on the sand. She just celebrated her 50th birthday this month, and in honor of the milestone, she held a Birthday Drive to raise money for The Delta Children Home. Sheryl's philanthropic outreach will continue in April, when she participates in the Country Music Marathon in support of the New Hope Academy. It will be a busy month for the star, since both of her sons were born in April. Wyatt's turning 5 and Levi turns 2 this year.