I kind a get blur vision of the story.. I'm not sure whether the main character (a girl) was actually a witch or an angel.. but one thing for sure is she can stop time just by joining her two index fingers..

Out of this world?

There's also Sabrina The Teenage Witch, that began airing mid 90's.

I don't think its sabrina.. because I am so into the sabrina series.. maybe it's the other one.. will try to look for it.. thnx for the info