Willis collaborated with artist Sophie Calle for her installation "Take Care Of Yourself" with a performance in time-based media in 2007, which exhibited at the French Pavilion of the Venice Biennale in 2007. Willis also contributed vocals to time-based media performance "Rinologia" of Barcelona-based artist group Los Rinos who are artists Marcel.lí Antúnez, Pau Nubiola and film director, Sergi Caballero. "Rinologia" was performed at the BEM Festival in Burgos, Spain in March 2007. Willis had two of her first solo exhibitions of oil paintings, in 2012, first of which were in March 2012 at Galleria Kingi Kongi in Helsinki, Finland and in November 2012 at Pirkko-Liisa Topeliuksen Galleria, also in Helsinki, both titled "Gatherings". Willis will have a solo exhibition at Gallery Emil in Tampere, Finland titled "Talking Trash"; February 2, 2014 – February 28, 2014. Willis contributed 10 jewel cases, painted in acrylic and one musical track, of ten musicians/visual artists musical contribution, "Do the Watusi" (written by Jimi Tenor, Pete Toikkanen & Nicole Willis) to curator/artist Jaakko Tuomainen's group exhibition "Soundtrack for Painting" from September 1 to 30, 2012, at the Lahti Modern Art Kiosk, in Lahti, Finland. Willis has contributed a painting to a group exhibition to be shown from July 18 to August 11, 2013 in London, United Kingdom's A Side B Side Gallery, curated by artists Chloe Mortimer & Harry Pye, titled "ELVIS: I Love You Because" of which the subject is Elvis Presley.