Playing on the famous "4" that has been associated with the year-long celebration of the Quadricentennial anniversary of the University of Santo Tomas, 40,000 students, faculty, employees, administrators and alumni  will sing together six songs that characterize the Thomasian: religious, Filipino, contemporary and Thomasian. Dubbed as "40, 000 voices for UST's 400", the musical event will take place at six o'clock in the evening, on January 27 at the UST Grandstand and open field where the singers will take their respective places, clad in color-coded t-shirts that classify them according to their voices: blue for bass, white for tenor, orange for alto and fuchsia for soprano.

The UST Singers, the Conservatory of Music choir and the various college choirs will be on stage to lead the 40,000 participants who are in the open field. This rare musical experience will come immediately after the Neo-Centennial Eucharistic celebration which will also be held in the same venue as the "40,000 voices".

Dr. Herminigildo Ranera, who arranged the six songs, will conduct the UST Symphony Orchestra. The songs included are: Joyful, joyful we adore thee, a medley of Philippine folk songs (Leron leron sinta, Magtanim ay di Biro, Pen Pen de Sarapen) and the Abba medley (Thank you for the music, I have a dream, Chiquitita). The 40,000 voices will end with the singing of "Ako'y isang Tomasino, the Quadricentennial hymn, and the UST hymn.

The Thomasian community will once again be treated to awesome fireworks display at the end of the evening's affair. It will be followed by the Neo-Centennial Thomasian Grand Fiesta and Grand Variety Show at seven in the evening. The UST Quadricentennial activities started in December 2009 and will end on the 27th, one day before the feast day of St. Thomas Aquinas, UST's patron.