Egao ni Namida ~Thank You! Dear My Friends~ (笑顔に涙～Thank You! Dear My Friends～; Tears to Smile ~Thank You! Dear My Friends~) is Okai Chisato's 3rd digital single. It was released on December 10, 2010 as a part of the Hello Cover Series. The single, a cover of a song from Matsuura Aya's album First Kiss, was only sold through iTunes Store and MUSICO.