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

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Superstore - Season 5
Chris Haston/NBC
Superstore - Season 5
Chris Haston/NBC

Demi Lovato guest stars as Jenny.

Superstore - Season 5
Chris Haston/NBC

Will (Eric McCormack) and Jenny

Superstore - Season 5
Chris Haston/NBC

This should be interesting….

Superstore - Season 5
Chris Haston/NBC

Smile!

Superstore - Season 5
Chris Haston/NBC

Jack (Sean Hayes) and Grace (Debra Messing)

Superstore - Season 5
Chris Haston/NBC

Karen (Megan Mullally)

Superstore - Season 5
Chris Haston/NBC

Will, meet Jenny.

Superstore - Season 5
Chris Haston/NBC

And Jenny, meet Karen.

Superstore - Season 5
Chris Haston/NBC

Welcome to AnnieCon, Grace and Jack!

Superstore - Season 5
Chris Haston/NBC

Jack and Grace at AnnieCon

Superstore - Season 5
Chris Haston/NBC

Karen and Luke (Christopher Thornton)

Superstore - Season 5
Chris Haston/NBC

Will and Jenny

Superstore - Season 5
Chris Haston/NBC

Grace

Superstore - Season 5
Chris Haston/NBC

Jenny and Will

Superstore - Season 5
Chris Haston/NBC

Grace takes the stage!

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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).

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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