How i do the glow( EASY)

Done in Paint tool SAI, last step in Adobe Photoshop 
-Use the soft brush on everystep, just change the size ( from big to small) 
-First step is on normal layer with light color (basic color) 
-In the second step create new layer with ( LUMINOSITY SETTING )  and  select bright color (soft brush !)  
-Repeat this in every step,always create new layer with LUMINOSITY , use lighter and lighter color in every step !
-Use some sparkle dots brush in Photoshop to add some cool effect at the end , you can use effect color dodge to make the dots glow 
Done