It's only a matter of time now. Khloe Kardashian and Lamar Odom have been estranged for weeks now, and sources say it's more a question of when, rather than if, the couple will announce a formal split. As revealed in the Sept. 30 issue of Us Weekly, the spouses of nearly four years no longer speak and are basically living separate lives at this point.

"Her assistants packed up Lamar's clothes and dropped them off at his loft," a source tells Us of Kardashian, 29, who booted Odom, 33, from their $4 million mansion two weeks ago.

Adds another pal: "She'll be the one who ends things, and it will be soon."

For more on the couple's imminent split -- including Odom's refusal to acknowledge his drug problem -- watch this week's Hot Stuff video, as explained by Us Weekly entertainment director Ian Drew and Nashville Star winner Chris Young, whose new album, A.M., is out now.

Other stories in the roundup: Kristen Wiig's reunion with ex-boyfriend Fabrizio Moretti; Jessica Simpson's wedding plans with fiance Eric Johnson; and much more!