Castrillo and his band—which included alumnus Alex Alvear, faculty members Ernesto Diaz, Daryl Lowery, Dino Govoni, and Tim Mayer, and guest trombonist and Rainbow Band member Robynn Amy—ripped through a high-energy set of beloved Mambo Kings material. The last number, Tito Puente's "Oye Como Va," was a showstopper. To the surprise and delight of the audience, Berklee president Roger Brown took the stage and played timbales alongside Castrillo on an amazing version of the legendary song. The crowd was on its feet for the entire song.

The next night, the festival returned to the Hot Tin Roof for pop-rock singer/songwriter and Berklee alumna Juliana Hatfield, known for her work with the Blake Babies and Some Girls, as well as her acclaimed solo albums. Playing in a trio, she performed several songs from her new album Made in China, including "What Do I Care" and "Stay Awake." The stage seemed bare compared to the bevy of musicians that packed it the night before, but Hatfield's trio filled the space, playing her self-analytical songs at top volume.

The Unbusted opened up for Hatfield and rocked the audience with a driving set of infectious melodic power-pop songs. The trio of native Vineyarders—composed of Joe Keefe, Seb Keefe, and Ben Smith—has been making a name for themselves touring nationally and opening for bands like Cheap Trick, and will soon release their debut album.

Once again, the festival closed on a high note with the return of the Reverence Gospel Ensemble to the Whaling Church in Edgartown. Directed by faculty member Dennis Montgomery III, the popular ensemble, normally 45-50 strong during the academic year, featured around 20 singers and musicians for the summer session. Despite its scaled-back lineup, the group was hardly lacking in talent, showcasing the best and brightest vocalists studying at Berklee's Five-Week Summer Performance Program. Featured soloist Renese King, an alumna and now a Berklee staff member who has sung with the Boston Pops, belted out several tunes, wowing the packed church with her powerhouse vocals.

Student Farah Siraj opened the Reverence Gospel Ensemble concert, performing two moving songs, one of which, "To the Sudanese Women," was written by Siraj to raise awareness about the plight of the women and children in war-torn Darfur. The song was taken to the region earlier this year by a delegation of women, which included Roger Brown's wife Linda Mason, and played for the Darfurians. Later in the concert, Mason took the stage and described her experiences there, with slides from the trip, illustrating the devastation in vivid detail.