Credit: MAVRIXPHOTO.COM

Sounds toxic.

Insiders tell Us Weekly that a "miserable" Britney Spears has been sneaking phone calls to Adnan Ghalib, the paparazzo ex-boyfriend widely blamed for enabling the media circus of 2007-2008 that led to her infamous mental breakdowns.

Spears' secret chats persist in spite of a March 2009 restraining order against Ghalib, 37, and her current relationship with ex-agent Jason Trawick.

What in the world do the former lovers talk about? "She says she's not living the life she wants," a source tells Us of the 28-year-old star, currently under dad Jamie's conservatorship.

And despite the singer's seemingly content life with Trawick, 38, another source says "she really wants to get back together with Adnan," who shared private voicemails and intimate details of their romance with the press in 2008.

To read how Trawick confronted Ghalib, how Britney complains of being in "prison" and more, pick up the new Us Weekly -- out now.