Your wedding music should be discussed with the music director. Catholic weddings differ from secular weddings in that the music is intended not merely to set a mood or to be pleasing but to guide the whole community into the worship that a wedding is.
Some suggestions:
PRELUDE: classical/instrumental. May include one or two appropriate vocal solos if needed. Discuss this with the music director.
Examples of classical instrumental-
Clare de lune (Debussy)
Prelude in C (Bach)
The Swan (Saint Saens)
O Perfect Love (instrumental arr.)
Be Still My Soul (instrumental arr.)
PROCESSIONAL (instrumental)
Canon in D (Pachabel)
Jesu, Joy Of Mans Desiring (Bach)
Trumpet Voluntary (Clarke)
PROCESSIONAL (hymn/congregationally sung)
Joyful Joyful We Adore Thee
All Creatures Of Our God And King
City of God
PSALM There are several options open here. The couple should choose the text first from an appropriate list, and the music director will provide options for appropriate settings.
PREPARATION OF GIFTS (Offertory)
Vocal Solo
Ave Maria (unless this is used for Flowers to Mary following communion)
My Beloved (Kari Jobe)
The Prayer (Foster, Sager, Testa, & Renis, commonly sung by Dion and Bocelli, can be solo or duet)
Wherever You Go (Gather hymnal, #867, not recommended for congregational Singing)
CONGREGATIONAL SINGING
How Can I Keep From Singing
Shelter Me O God
Lord of All Hopefulness
COMMUNION
Vocal Solo
How Beautiful
COMMUNION Congregational Singing
Pan de Vida
One Bread, One Body
Take and Eat
FLOWERS TO MARY
(With the priest's permission the couple may present flowers to Mary following communion)
Ave Maria
Hail Mary, Gentle Woman
RECESSIONAL (Instrumental)
Trumpet Tune (Purcell)
To God Be The Glory (organ arr, not sure of composer)
Festival Alleluia (organ arr of All Creatures of Our God and King)
Traditional Wedding Recessional, by Mendelssohn
All Of Me (instrumental, Piano Guys, piano only)
RECESSIONAL (congregational)
Praise to the Lord
All The Ends Of The Earth