She has played in Italy, France, England,[1] Germany,[2] Portugal,[3] Denmark, Czech Republic, Austria,[4] Spain, United States,[5][6] Mozambique,[7] Tunisia, India.

In 2006 she released the album "Chi mi darà le ali"[8] (Who will give me wings); her repertoire as a performers includes, among others, compositions by Erik Satie, Claude Debussy, Maurice Ravel, Baldassarre Galuppi, Leoš Janáček, Gurdjieff / De Hartmann, Scott Joplin, John Cage and Philip Glass.

Celletti has collaborated with the Swedish conceptual artist Paulina Wallenberg Olsson, the saxophonist Nicola Alesini, the percussionist Marcello Piccinini, the poet Beppe Costa, the multi-instrumentalist Luca Venitucci, the double bassist Daniele Ercoli, the violinist Her, the thereminist Maurizio Mansueti, the drummer Charles Hayward, the composer Lawrence Ball,[13] the actor Flavio Bucci, the dancer Gloria Pomardi, the artist Giorgio Andreotta Calò, the artist Ray Caesar,[14] the English composer Mark Tranmer (aka GNAC) with whom she published the album "The Red Pages[15]" and the exponent of contemporary experimental electronic music, Hans Joachim Roedelius[16] with whom, in 2009 for the North American label Transparency,[17] she has composed and recorded the album "Sustanza di cose sperata".

In 2020 Alessandra Celletti collaborates with the musician Alberto Tre and with the New York Times journalist Ian Urbina for the composition of Heroes[22] part of "The Outlaw Ocean" project.

She told me about her project, a bit crazy, but exciting and original: to take the music far and wide and seduce people along the miles, and I imagine her, sitting at her piano, aboard a large truck, shrouded by the light of the sunset, while the stars up there start to draw the blue sea sky, she lets herself go to the sweetest melodies, like a dreamed image of a film by Fellini".

[24] In 1996, following repeated nuclear experiments on Mururoa, Alessandra Celletti composed and published "Overground" a CD that represents a protest against the tests authorized by Chirac on the Pacific atoll.

It is a surreal and strong way to fight to draw attention to the painful consequences caused by the short-sighted choice of halving the funds allocated to the Museums, the Historical Archives and the Libraries of the Lazio Region.

The notes will begin to flow, then, without warning and without giving the time to understand, I will interrupt the sound and it could happen right on the most beautiful, particularly effective harmonic lap, by half tearing the melody.

In the summer of 2013 Alessandra Celletti joined the initiative of Maria Andaloro Occupied Place[28] the campaign launched to keep alive the focus on violence against women.