CBS's hit sitcom "The Big Bang Theory" never ceases to entertain, and continues adding memorable nuggets for its viewers to smile about and remember. In the episode 6 of "The Big Bang Theory" Season 7, "The Romance Resonance," Howard (Simon Helberg) sang a song for his Bernadette (Melissa Rauch), which was his first anniversary surprise for her. [Check the Video of the Bernadette Song]

 [Youtube/thebigbangtheory]

Kate Micucci and Riki Lindhome wrote the Bernadette song. Kate said to The Hollywood Reporter that Steve Molaro, the show-runner of "The Big Bang Theory," approached her to write the song about a month and half ago.

"They suggested the idea of Wolowitz singing about what his life would be without Bernadette," Kate said while talking about the instructions that they received for the song. And, Kate and Riki wrote the song in a week's time.

"On the day of the live taping there was only one take. Simon nailed it," Kate said.

Kate also has a recurring role as Lucy in "The Big Bang Theory." In Season 6, Lucy and Raj (Kunal Nayyar) dated for a while before Lucy, who has social problems, decides to not continue with the relationship as it was getting too much for her to handle. Kat's character is expected to make an appearance in the episode scheduled to air on November 14, 2013. She will be meeting Penny (Kelly Cuoco) in the episode. However, there is no news on whether Raj will get to meet Lucy or not.

In this week's episode: "The Proton Displacement" : "Sheldon feels slighted when Professor Proton seeks advice from Leonard instead of him, and he seeks revenge by befriending a rival science TV host, Bill Nye. Meanwhile, Raj gets jealous when Howard crashes "girls' night," according to CBS' official synopsis.