The best friend jingle is used when Vanessa enters the clubhouse. Vanessa is best friends with Angela as said in her character page. The jingle goes like this. 
Best Friends


Vanessa: Yo, Angie!

Angela: Yo, Vanessa!

Vanessa: How are you?

Angela: I'm fine and how about you?

Vanessa: Me too.

Angela: It's nice to see you!

Vanessa: Nice to see you too.

Both: We're best friends! That's what we're meant to be!

Angela: I love you!

Vanessa: I love you too.

Both: We love each other cause we're best friends!

The end