Affix
self-adhesive velcro to the underside (scratchy side of velcro) This makes them stay well enough to attach a clip, flower or bow to the headband.
or
Apply
Silicone Adhesive Sealant, the same used in making
No Slip Clips. Fold the ribbon in half to find the center, then apply approximately four inches to either side. For smooth straight silicone lines: tape the edges with painters tape, apply the silicone, smooth evenly, remove painters tape and set aside to allow silicone to dry (at least a day).