BOSS is a 3-day event featuring everything you've come to expect from an a cappella festival and more.

Joined September 2011
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28 Mar 2024
This year, All-Access Pass holders have a chance to sing along with headliner Rebel Bit for a song during the Pro Concert on SATURDAY, APRIL 20TH. 🎤 Interested in being part of the Rebel Bit Choir? Learn more about how you can participate ➡ casa.org/boss/rebel-bit-choi…
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26 Mar 2024
In one week, we'll be hanging out LIVE on Instagram (@bossaca) with #BOSS2024 Featured Instructor, Matt Goldstein! Host Emily Flanders will be chatting with Matt about all things a cappella & singing. See you there on TUESDAY, APRIL 2nd @ 6:30pm ET/3:30pm PT! #HangWithBOSS
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23 Mar 2024
Surprise—our #BOSS2024 Scholastic Competition will feature a special deliberation performance by not one but THREE incredible artists: Alex Blue, Claire Ernst, and Léa the Leox! Get your tickets to the show on FRIDAY, APRIL 19th ➡ bit.ly/boss2024-competition
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12 Mar 2024
Join us on Instagram (@bossaca) a week from today as host @EmFlanVV chats LIVE with Emily Drum & MaryAnne Muglia of our Pro Concert headlining group Red Letter Daze. #HangWithBOSS this TUESDAY, MARCH 19TH @ 6pm ET/3pm PT—see you there! 👋
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Joining our Featured Educator, Matt Goldstein, we have an all-star lineup of #BOSS2024 instructors who will be leading workshops & masterclasses! Classes take place SATURDAY 4/20—only accessible with an All-Access Pass ➡️ bit.ly/boss2024-AAP Detailed class info to come...🧑‍🏫
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We're thrilled to announce award-winning arranger, teacher, facilitator, improviser, and songwriter Matt Goldstein as our #BOSS2024 Featured Educator! Get exclusive entry to workshops on SATURDAY 4/20, only with an All-Access Pass: ➡️ bit.ly/boss2024-AAP
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29 Feb 2024
Introducing #BOSS2024 Headliner: ⭐️RED LETTER DAZE⭐️ Red Letter Daze comprises accomplished arrangers, singers, educators & producers from across the US, celebrated for their unique & refreshing pop sound. See them at the Pro Concert on Saturday, 4/20 ➡️ bit.ly/boss24-concert
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23 Feb 2024
Introducing #BOSS2024 Headliner: REBEL BIT Hailing from Italy, Rebel Bit is an innovative team of musicians who create soundscapes that combine vocal music & electronic experimentation. See them at the Pro Concert on 4/20. Tix on sale TOMORROW 10AM ET ➡️ bit.ly/boss24-concert
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20 Feb 2024
#BOSS2024 SCHOLASTIC COMPETITORS: Accent @nsaccent Gestalt @GestaltAca Mixed Mode @mixedmodeucf NOTEorious @nrhsacappella Noteriety @UANoteriety Pitch, Please! @NUPitchPlease Voicebox @TheVoiceBx Get your All-Access Pass to see who comes out on top ➡️bostonsings.com
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14 Feb 2024
We're seeking volunteers to join the #BOSS2024 team! In particular, we need PHOTOGRAPHERS 📸 & VIDEOGRAPHERS 🎥 for our festival. Our festival is completely volunteer-run, so we always appreciate additional helping hands. 🫶 Apply now: ➡️ casa.org/boss/volunteer
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If your high school or collegiate group is looking to push artistic boundaries by exploring weird & wonderful storytelling through creative prompts—then the #BOSS2024 Scholastic Competition is for YOU! Submit to compete by THIS SUNDAY, 2/11, 3pm EST. ➡️ casa.org/boss/compete
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Looking for #BOSS2024 lodging? Book our Hotel Group Rate w/ @HyattPlace Boston/Medford for $159 tax/night. Use the link below (make sure to updated your intended dates) to book between 4/18–4/21—breakfast & wifi included! Rate available until 3/22. ➡️ bit.ly/boss2024-hotel
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Are we destined for an early spring or a long winter? Can't be sure, but we CAN guarantee an incredible #BOSS2024 experience featuring Pro Concert headliners REBEL BIT and RED LETTER DAZE! Get your All-Access Pass now—before Early Bird pricing ends. ➡️ bit.ly/boss2024-AAP
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31 Jan 2024
Wondering how you could lend your expertise to #BOSS2024? Share your workshop ideas with us—all classes and subjects are welcome!—or simply apply to be a masterclass clinician. Applications are due in just TWO DAYS, by this FRIDAY, FEBRUARY 2ND! ➡️ casa.org/boss/teach
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11 Jan 2024
BOSS has been pushing the boundaries of scholastic performance for 10 years—and we're not stopping now! If this drive to innovate resonates with your scholastic group, submit to compete at #BOSS2024. 🏆 Submissions due SUNDAY, FEBRUARY 11TH. ➡️ casa.org/boss/compete
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Do you or your group need financial help getting to #BOSS2024? Apply for the A Cappella For All Scholarship at casa.org/scholarship! Applications are due FRIDAY, JANUARY 26 by 8pm EST. Interested in supporting the cause? Donate to the fund at casa.org/give.

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We are seeking instructors to lead new interactive workshops as well as tried-and-true courses at #BOSS2024. If you've got a unique experience to share, apply to teach! Applications due FRIDAY, FEBRUARY 2ND by 11:59pm EST. ➡️ casa.org/boss/teach
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22 Dec 2023
Tickets for #BOSS2024 are NOW AVAILABLE! We hope to see YOU there next April 19-21! 🎟️GET TICKETS, 🏆SUBMIT TO COMPETE, 🎓APPLY TO TEACH, and learn more at ➡️bostonsings.com. Wishing you a happy holiday and joyous new year! <3, the BOSS Team
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