Nicholas White Hollywood’s support for Race to Erase MS kept rolling into its 31st year Friday at the Fairmont Century Plaza in Los Angeles, helping the Nancy Davis-led charity raise $1.5 million to multiple sclerosis research. The night’s headlining musical act, Natasha Bedingfield, played a medley of hers and others’ songs, including her 2000s-era hit “Unwritten,” which was recently given a new life in “Anyone but You,” and Bill Withers’ “Lean on Me,” which she sang alongside Davis and friends. Bedingfield was introduced by Casey Affleck.