Open Question: SONG SUGGESTIONS!!? (your favourite songs of all time)?

I am on a mission to fill my 120gb ipod with amazing music!! I know there are plenty of songs out there I've never heard, but would fall in love with. Help me find them! I love any genre minus heavy metal. I need jazz, musical, a capella, classical, salsa, hip hop, rock ...you name it. Songs that leave footprints on your heart! Songs that are truly GREAT!! I have recently been searching for some classical, a capella, etc and come up with the list below. If you know any songs similar please add them to your suggestions!! Thank you =)) Frederic Chopin- lots!! Frank Martin: Mass for Double choir Cantus- Ave maria -Goodnight my angel -Singing it’s alright - 23rd psalm -Pater Noster Gregorian Chant by Chant Group Psallentes Super flumina Babylonis Palestrina Brompton Oratory Palestrina - Sicut Cervus King's College Choir Cambridge - I heard a voice Thomas Tallis - Spem in alium - Tallis Scholars The Tallis Scholars - Thomas Tallis - Miserere Nostri Siyahamba (we are marching in the light of God) Joe Hisaishi- One Summer’s Day (from Spirited Away) Simon & Garfunkel- Scarborough Fair brian brink -Carol of the Bells.- Greensleves- piano or guitar version greensleeves -- by king singer's (A capella) The King’s Singers- and so it goes - greensleves Billy Joel - And So It Goes Gregorio Allegri - Miserere mei, Deus Paul Simon: Diamonds on the soles of her shoes Chanticleer- Dulaman (Gaelic) -ave maria -the first noel Jars of Clay- Hymn Mediaeval Baebes- salva nos -scarborough fayre Yuki Kajiura- unforgetable Sad Romance from Thao Nguyên Xanh Bleach- Never meant to Belong Samuel Barber- Adagio for Strings by (theme for movies "The Elephant Man" and "Platoon") Josef Hassid - Jules Massenet - Meditation de Thais Tchaikovsky- June - Serenade for Strings in C major, Op. 48 (Balanchine ballet) Gluck/ Kreisler -"Melodie Beethoven- Moonlight sonata Ludovico Einaudi- Primavera -Le Onde The Waves -Divenire -Andare -monday Maksim-exodus Claude Debussy - Arabesque #1 -Clair de lune (Twilight soundtrack) Johann Sebastian Bach- prelude from gello suite no.1 in G major - Jesu -Goldberg Variations -fugue - air on a G string - Joy of Man's Desiring Yiruma lee -river flows in you -kiss the rain Erik Satie - Gymnopédie No.1 Maurice Ravel - Pavane pour une infante defunte Mendelssohn - songs without words & 'the sighing wind' Mozart- Great Mass in C minor -Requiem - Lacrimosa - Oboe Quartet In F, K 370 - 3 Rondeau Allegro John Barry- The john dunbar theme Love theme from "Romeo and Juliet" - violin/piano duet theme from "Love Story" - violin/piano duet Vivaldi- spring Debussy- Pavane Cavatina, for guitar. Bolero- Maurice Ravel Henrique Oswald- Il Neige Liszt - Liebestraum No. 3 -Liebestraum -La Campanella