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 / Updated  / Source: TODAY
By Isabella Roman

April Fools' Day is the one day a year you are given permission to prank your friends, family and colleagues — and celebrities are no exception.

Singers, athletes and reality stars got in the spirit this year by posting pranks to their social media sites involving fake baby bumps, injuries and more. One former game-show host surprised an entire audience! Keep reading to see hilarity ensue.

Catherine Lowe ... pregnant?

The "Bachelor" star took to her Instagram to post a very convincing picture of what seemed to be a baby bump. Her caption reads, "17 weeks." Lowe's rep told People Magazine that the father of the baby is not husband Sean Lowe, but Andy Dick, whom she met on "Dancing with the Stars." Lowe has revealed that both the baby bump and the statement provided by her rep were merely pranks.

Sam Smith confuses fans

The 22-year-old Grammy winner celebrated April Fools' Day by confusing his 2 million-plus Twitter followers. The openly gay singer tweeted, "Guys I have some news... I'm straight." Soon after, he cleared up the confusion by confessing, "April Fools," accompanied by a laughing/crying face emoji. Well played, Smith. Well played.

Bob Barker returns to the stage

"The Price is Right" has a history of pulling pranks on its audience on April Fools' Day, and this year was no exception. When the usual host, Drew Carey, was announced, his predecessor, Bob Barker, walked out instead. The audience was truly shocked.

Tom Brady injured from head to toe.

No need to worry Patriots fans, your beloved quarterback is okay! The four-time Super Bowl winner posted a Facebook photo of himself in a full body cast with the caption, "Jordan's crossover is no joke." The caption comes after Brady played a game of basketball with the legendary Michael Jordan in the Bahamas. The photo even has a fake autograph of the basketball player.

Katy Perry chops it off (or does she?)