She has written hits for artists such as Willie Nelson, Waylon Jennings, Reba McEntire, The Oak Ridge Boys, George Jones, Kenny Rogers, Keith Whitley, Randy Travis, Patty Loveless, Agnes, Kate Ryan, Claire Richards, Boyzone, September, and Dimash Qudaibergen.
[4] Vaughn’s first big songwriting success was "My Heroes Have Always Been Cowboys",[5] which was first recorded by Waylon Jennings in 1976 and further popularized in 1980 by Willie Nelson for the soundtrack of the movie The Electric Horseman.
Since then she has worked with country artists such as Dolly Parton, Waylon Jennings, George Jones, Tammy Wynette, Tanya Tucker and Kenny Rogers.
She has also worked with many Scandinavian songwriters and artists including Agnes, Mutt Lange, Tony Nilsson, Vendela, Anders Hanson and Emilia.
[8] In 2013, Vaughn received a JASRAC Award as #1 of the Top 10 Foreign Works for her 2011 co-written song "Rising Sun" by the Japanese pop band Exile.