Who Did The Best Eb6 note in head voice/falsetto?

Who out of Christina Aguilera, Syesha Mercado, Sumi Jo, Shoshana Bean, Kristin Chenoweth, Ann Wilson, Lani Misalucha, Leona Lewis, Rachael Lampa, Kristen McNamara, Melody Thornton, Nicole Scherzinger, Celine Dion, Amy Winehouse, and Patti Labelle has the best Eb6 in falsetto?