Monica abruptly left Twitter last month, causing many to speculate that haters got the best of her. But the R&B songstress reveals that the decision was more serious than she let on.

“I quit Twitter for a way deeper reason,” Mo said during an interview on WPGC 95.5’s “The Big Tigger Morning Show.” “At first we couldn’t really talk about it, but we had a way more serious situation than just somebody saying something on Twitter. And legally we couldn’t really talk about it at the time. It was just suggested. OK, come off Twitter, find out who some of these people are… It was not anybody on Twitter. It was someone keeping up with me through Twitter.”

The recently engaged singer explained that a stalker was tracking her moves using the social networking service. “It’s been going on for years long before Twitter, but they were using Twitter as a tool to keep up with me.”

Despite attempts, the naysayers couldn’t break the “Still Standing” hitmaker with their words. “Some people thought it was something that someone said to me on Twitter,” added Monica. “It was absolutely nothing like that. People have talked about and been cruel toward me and ever other artist long before Twitter came about, so it would never be something as simple as something that somebody said.”

In addition to planning her wedding to fiancé Shannon Brown, the mother of two is in the studio with Polow Da Don working on her new album, tentatively due next summer.