At a press conference to announce its fall lineup, the WB announced that it has spared teen series “Felicity,” “Roswell” and “Popular” from cancelation. The series, which have struggled in the ratings, were fan favorites. “Roswell” fans even bombarded the WB mailroom with bottles of Tobasco sauce (a condiment favored by the show’s teen aliens). Among the new series on the lineup: “Nikki,” a starring vehicle for Nikki Cox (“Unhappily Ever After,” “Norm”) and “Grosse Pointe,” a behind-the-scenes look at a primetime soap from Darren Star (the successful producer of primetime soaps including “Beverly Hills, 90210” and HBO’s current “Sex and the City”). The WB also picked up ABC’s “Sabrina, the Teenage Witch” and the Eddie Murphy animated series from Fox, “The PJs.” In an interesting move, the WB plans to air “Felicity” and the returning “Jack & Jill” in the same time slot (Wednesday at 8 p.m.). “Felicity” will air through December, followed by “Jack & Jill” through March and the return of “Felicity” in April.