If you want to learn to sing like Cathy Jean from Cathy Jean & The Roommates, you should focus on the following techniques:

• Develop your chest voice register through exercises from Singing Carrots' video on the Chest Voice Explained.
• Learn to introduce vibrato into your singing through Singing Carrots' video on Singing with Vibrato.
• Try incorporating growling into your performance with the help of Singing Carrots' video on Vocal Distortion & Growling.
• Learn some of the classic songs made famous by Cathy Jean & The Roommates by using Singing Carrots' song search tool.
• Improve your singing abilities through Singing Carrots' 21-lesson educational singing course.

Additionally, Singing Carrots offers articles such as How to Analyze Your Voice and Resonance in Singing to aid in your understanding of your own voice and how it works. Good luck on your journey towards singing like Cathy Jean!