It does look like its done with a curling iron or rollers especially the sides/front parts. If im not mistaken she actually looks like she has extensions in. Looks like it by her staight hair. If it is extensions it still looks nice.
Modified CG-Use Low Poo
Use Suaves & VO5 Condish For CG-Honey+ Condish=My curls are loving it!
*Suave gels ( love crunchy gels )*My HGs-Re:coil, Jessicurls , Boots , Loreal Spiral Curl Mousse, Tigi Amp*

*~Show Your True Beauty Cuz Curls Rock!~*