Knock, knock. Who’s there? It’s Jennifer Hudson!

"The Jennifer Hudson Show" has partnered with local stations across the country to surprise viewers at their front door. “Knock Star” is the fun game that you can play without leaving your house!

Each day, one lucky viewer is picked to be the latest Knock Star, answering questions and participating in fun challenges for the chance to win a prize!

Are you excited about the opportunity to play a fun game with JHud right at your front door? Sign up to be our latest Knock Star!

Check out all the fun below!

Christal Young from Fox 5 New York surprised sisters Maria and Doris in Grand Central Station. Then Jennifer challenged them to answer a trivia question (involving her first love, King Kong) for the chance to win cash!

JHud surprised “The Jennifer Hudson Show” viewer Courtney and her fiancé, Trae, at their home in Los Angeles. Jennifer heard about how the couple fell in love before gifting them a little cash to help them set up their life together.

Jennifer surprised dance teacher Aileen Aruaz and her eight-year-old daughter Belle Marie in Miami, Florida. WSFL’s Jason Carter challenged the duo for the chance to win $250!

Jennifer surprised Antoine Miller, the founder of Sounds of Success Community Marching Band in West Palm Beach, Florida. Antoine and his band took on challenges to win $500 — then Jennifer surprised them with another $2,000 toward their travel fund, for a total prize of $2,500 from WPBF 25 and "The Jennifer Hudson Show"!

Christal Young from Fox 5 New York helped Jennifer surprise fan Tahisha Solages, who doubled her winnings while taking on a challenge in Washington Square Park in New York City.

“Knock Star” goes to the Windy City! Jake Hamilton from Fox 32 Chicago helped Jennifer surprise Cynthia DeLira, a cancer survivor and mom who is helping the children in her community.

Step team coach Treena Moore from Baltimore, Maryland, was exhilarated to discover WBAL-TV correspondent Megan Rivers and “The Jennifer Hudson Show” visit her team’s practice at Harlem Park EMS.

The enthusiastic kids on the step team performed a lively routine for JHud, and Treena and the school was surprised with $250 and a brand-new grill so they could have cookouts!

“Oh my god!” exclaimed a shock Cindy Cordova when she opened the door to her home in Long Beach, California, to find “The Jennifer Hudson Show” — and JHud on a live feed! “I think I just peed a little!”

The executive assistant at UCLA and mom of twins had to answer a music trivia question correctly to win a big prize. Even though she didn’t get the right answer the first time, JHud gave her a second chance, and Cindy won $250!

“The Jennifer Hudson Show” surprised superfan and tech executive Lynn Calvert and her mother Sheila at their home in Sherman Oaks, California! Lynn modeled a “Jennifer Hudson Show” shop “Hold the Line” T-shirt for a chance to win $250 and show merch for her and her mother.

Kasey Carr, who recently moved from Florida to from Tarzana, California, is a self-proclaimed “cool grandma.” Kasey was met at her door by “Jennifer Hudson Show” correspondent Bianca and answered Florida-related trivia to win $250!

Watch this Knock Star here!

Jennifer Hudson surprised superfan Ian Tatum at his door—but not without going on a search for the right residence first! After JHud and the studio audience celebrated our correspondent Keetin finding the right address, Ian – an educator from Azusa, California — answered a bit of music trivia and won $250!

Rideshare driver Yvonne Felder gets an unexpected knock at her door from “The Jennifer Hudson Show”! Yvonne sends her love to JHud and the show's staff after winning $250!

Grandmother Sabrina Moss from Sherman Oaks, California, was over the moon to find “The Jennifer Hudson Show” at her door! She won $250 to name her many grandchildren in 10 seconds! JHud had another surprise in store for her — an invite to play more games in-person at the show! And she brought her own mother along for the ride!

Sandra Endo from KTTV surprised Chris Blake at his downtown Los Angeles home. Chris revealed to Jennifer that watching her on “American Idol” inspired him to audition for the singing competition series — and the two launched into an amazing duet of “Amazing Grace”!

“The Jennifer Hudson Show” paid a surprise visit to California nurse Chloe Bethke’s apartment. “Extra” weekend co-host and KTTV correspondent Melvin Robert challenged Chloe with some trivia and a scavenger hunt for the chance to win a cash prize!

Single mom and recent empty nester Nicole Stewart was shocked when “The Jennifer Hudson Show” turned up at her front door with a fun challenge. She got an even bigger surprise when Jennifer Hudson invited her to the WB lot to join her in person!

“The Jennifer Hudson Show” airs weekdays. Here’s when to watch in your area.