These are some of the readings of the Gospel for the Quinceañera blessings.
Luke 1:26-38 The annunciation
Luke 1:46-55 The Magnificat
Matthew 25:1-13 Parable of the 10 serving girls
Luke 10:38-42 Martha and Mary
Bless the girls is part of the tradition for the Quinceañeras, actually it is the most important thing about it.