Gwyneth Paltrow sang Pharrell Williams' hit "Happy" for popular television series "Glee". Performance of American actress along with the heroes of the series will be shown in the episode, which will be released on March 18.

In the anniversary episode of "Glee" Paltrow also will play the role of a teacher.

Note that the show's producers decided to celebrate the 100th anniversary of the series by ctreating the collection of "Glee: The Music Celebrating 100 Episodes". Compilation will go on sale on March 25 and will include a completely new versions of songs from the TV series.