Since joining the cast of the new Melrose Place, original series star Heather Locklear hasn’t been making life easy for her co-workers, according to the National Enquirer. “Heather’s creating a lot of drama with her diva antics. It’s making our lives miserable,” a source says, adding that as a late addition to the show, Locklear feels pressure to improve the show’s floundering ratings. “She’s insecure and on edge. The responsibility is weighing heavily on her.”