This is a tribute to Colin Morgan and Katie McGrath, actors who play Merlin and Morgana on BBC's "Merlin." Video credit goes to SylarDavis08 on YouTube.

These are the lyrics to Vulnerable sung by Secondhand Serenade. Video credit goes to kittcute on YouTube.

Credit goes to iChaneil on YouTube.

Credit goes to SuperSimpleLyrics on YouTube.

These are the lyrics to "Stay Beautiful" by The Last Goodnight. Video credit goes to cegie28 on YouTube.

These are the lyrics to "I Want You to Need Me" by Celine Dion. Video credit goes to Thesnooml on YouTube.

This song is "O Children" by Nick Cave & the Bad Seeds. Video credit goes to HlbaGh on YouTube.

This song is "Called Out in the Dark" by Snow Patrol. Video credit goes to alohomoraxo on YouTube.

This is a tribute to Jim Parsons and Kaley Cuoco, actors who play Sheldon Cooper and Penny on CBS's "The Big Bang Theory." Video credit goes to BazingalsTheNewSexy on YouTube.

These are the lyrics to Shake It Out sung by Florence + the Machine. Video credit goes to MsEnnaisoj on YouTube

These are the lyrics to The Big Bang Theory theme song sung by The Barenaked Ladies. Video credit goes to dragondeathgod on YouTube.