Possible Clues:

• It's north of Austin on I-35
• U.S. radio station whose call letters spell the name of its city
• City dubbed the Heart of Texas
• Jennifer Love Hewitt's Texas birthplace
• U.S. city whose name is composed of two state abbreviations
• It's between Austin and Dallas
• Dr Pepper Museum's Texas home
• City south of the Metroplex
• Texas city hidden in "draw a conclusion"
• Texas home of the Dr Pepper Museum