How Will Guest Star Demi Lovato Help Will on 'Will & Grace'? (PHOTOS)

Meredith Jacobs

When Will & Grace returns from its winter hiatus, Will (Eric McCormack) is moving forward with becoming a father on his own — and that's where guest star Demi Lovato comes into the picture.

Lovato guest stars as a potential surrogate with stellar reviews, but when Will meets her, her lifestyle choices give him doubts. Meanwhile, Grace (Debra Messing) pretends to be a formerly famous Annie to gain entry to AnnieCon, while Jack (Sean Hayes) goes with her in hopes of completing his celebrity hair E.G.O.T. Plus, Karen (Megan Mullally) has a romantic encounter with a disabled veteran (guest star Christopher Thornton).

'Will & Grace' to Pay Tribute to 'I Love Lucy' in Final Season (PHOTO)

'Will & Grace' to Pay Tribute to 'I Love Lucy' in Final Season (PHOTO)

Will, Grace, Karen, and Jack are taking on iconic roles in memorable scenes.

Click through the gallery above for a look at Lovato's guest spot, AnnieCon, and more in the winter return, "Performance Anxiety."

Will & Grace, Thursdays, 9/8c, NBC