Glee had their extended "Born This Way"-themed episode last night, and besides the episode's big Lady Gaga number, the cast also danced to Duck Sauce's "Barbra Streisand" (which has been everywhere lately) and sang Lykke Li's "I Follow Rivers." Check out video and audio of the tracks below: "Barbra Streisand" [videoembed size="full_width" alignment="center"][/videoembed] "I Follow Rivers" [videoembed size="full_width" alignment="center"][/videoembed] Speaking ...