Catie Offerman

“Karen was one of my favorite teachers I’ve ever had at Berklee. I was a fiddle major but studying with Karen helped me with my singing, helped me progress, and find my voice. She is honestly the coolest gal, too. She made learning easy, and there were frustrating moments-like trying to expand my range, but it was enjoyable!” – Catie Offerman

Nashville MCA Recording Artist. Performances with Lady Antebellum, Lee Ann Womack, Willie Nelson, Robert Earl Keen, Ashley McBride, Josh Abbott, Parker McCullom.

Mario Jose

"If you've ever had a voice teacher, you know how impactful this relationship is to your career as a singer. Karen was my voice teacher for most of my time at Berklee College of Music in Boston, MA. I still feel the impact she had on me to this day. While studying with Karen, in terms of technique: my range expanded in both directions, my foundation of technique fundamentals was solidified, my tone was rounded and focused, and my mix became so much stronger and more seamless between registers. But what I really cherish about our time working together is how to use these techniques to emote. After working with Karen, I went from being a "technically" good singer to becoming an artist. She unlocked a deeper love of life, music, and singing within me that I'm now able to tap into to take a live performance or recording to another level. As a result, I have an arsenal of tools under my belt, and Karen is an integral part of who I am as a vocalist." - Mario Jose

Award-winning A Cappella group - Pitch Slapped. Opened for Pentatonix, Prince, Justin Bieber, Meghan Trainor (New Orleans Jazz Fest 2017 & LA Pride 2019), John Legend (NBC's Duets), Dua Lipa, Michael McDonald, Philip Bailey (of Earth, Wind & Fire), John Elefante (of Kansas), Jim Peterick (of Survivor), Bill Champlin (of Chicago), Paula Cole, Lalah Hathaway, Ben E. King, Post Modern Jukebox, Scary Pockets and many more! Mario's music has been featured on MTV's Movie & TV Awards, The iHeartMusic Awards, and his 2016 Debut EP "Heart Of Gold" premiered at #33 on the iTunes Pop Chart! Most recently, Mario has been working as one of LA's top Session Singers, where you can hear his voice on The Simpsons, Disney Channel, a Global McDonald's Commercial, and on Disney's "Encanto"!

Jackie Foster

“From the first lesson, Karen opened up my eyes to the endless possibilities of what my voice was capable of. She taught me control in my belting, flexibility in my runs, and more importantly, trust in my craft. I felt like I finally had a teacher who could teach by example! Someone who perfected the craft of belting, mix, and control and was teaching it in an easily translatable way. I had never experienced working with an incredible teacher who gave me chills every time she sang. Karen's kindness and compassion were also so valuable to me. I am a better singer, a better performer, and a better person. There is no one like Karen Carr." - Jackie Foster

NBC’s “The Voice”- 2018, Season 14 making it to the Semi-Finals and following up with Lollapalooza music festival in Chicago.

Jackie has also performed with Olivia Rodrigo, Leroy Sanchez, Carrie Underwood, Alicia Keys, Kelly Clarkson, and Justin Timberlake.

David Stewart

“Working with Karen was some of the most memorable experiences I had while at Berklee. Not only is she a complete expert vocalist and instructor, but also a caring and observant friend. Karen taught me vocal techniques and concepts while making me feel welcomed and respected in her space. I was fortunate enough to work with her from summer programs, all the way through 5 years of intense vocal performance studies as a full-time student. She’s one of those rare teachers that teach you how to be a better singer, a better musician, a better artist and a better person all at the same time.” – David Stewart

Lead vocalist for the alt-rock duo Migrant Motel (Performed at Lollapolooza, 1mil+ streams), full-time musical director (for Sofia Reyes, Naika, Las Vegas Events, etc.), and an international performer based in LA.

Casey Williams

“From my very first semester up until my last, I had the overwhelming pleasure of having professor Karen Carr as my private vocal instructor. It only took a handful of lessons with her to realize that she had a seemingly endless world of knowledge and wisdom to share with me. Karen is not only a remarkable vocalist, but she is a beautifully honest and intuitive teacher. She can spot issues (both technically and creatively) at the drop of a hat and can provide insightful, long-lasting solutions that can help a singer maintain their vocal strength for the rest of their careers. I felt so confident in the improvements that I was making so consistently with Karen as my teacher” - Casey Williams

Lead vocalist/writer and co-writer for the soundtracks of the online animated series RWBY for over eight years. Has performed at Austin City Limits and at conventions such as RTX and AnimeBoston. Voiceover work for the Japanese video game BlazBlue: Cross Tag Battle as the character Neo. Featured vocalist and choreographer for Lightbringer for Seven Spires' music video.

Godi Gaviria

“As a Rock Singer, It is so easy to develop bad habits and be reluctant to work on vocal technique. My voice would strain, and I was constantly frustrated. After working with Karen, my vocal health improved dramatically. My versatility, stamina, and control developed. She finds your weaknesses and helps you focus on your whole instrument. Seriously, every lesson was MIND-BLOWING!" - Godi Gaviria

Vocalist at Radio Paila. Composer and music producer for various artists: Consulado Popular, Nani, Savi, Boca De Serpiente, Pez Errante.