New York: Britney Spears is a dream for Fox`s hit musical `Glee`.
Tuesday`s episode that featured the star in some dream-sequence cameos drew an estimated 13.5 million viewers. The Nielsen Co. says it was the second most-watched episode of the show ever, behind last spring`s return from a hiatus.
That`s also an increase from the 11.1 million people who had tuned in to the "Glee" season premiere a week earlier. Spears was also a trending topic on Twitter during the telecast, exemplifying one of TV`s biggest new trends: viewers using social media to correspond with friends while watching.
The show`s cast performed five Spears songs during the episode, including "I`m a Slave 4U" and "Stronger."