Black Pink Jenny shared various congratulatory messages on her 30th birthday. On January 16, Jenny posted birthday messages she received from her members on her SNS story. The eldest sister Jisoo left a message saying, "Happy birthday, my forever cool Jenny. Let's have fun today ♥♡ Love you, let's laugh a lot today," to which Jenny replied, "Alabung."

Rosé posted a photo together with the caption, "Guess whose birthday it is today," and wrote, "It's Jenny's birthday! Love you." Jenny responded, "Love you, Rosé." Lastly, Lisa shared a photo with the message, "Our birthday girl Jenny unnie, love you," and Jenny replied, "Sreunge."

To celebrate her birthday, Jenny uploaded a short video titled "thirtyyyyyy" on her personal account. The video showed her lighting candles and making a wish in front of a cake with a '30' candle. Wearing sunglasses, Jenny held the cake, blew out the candles, and raised her arms in celebration amid the surrounding congratulations, conveying a free and confident energy.

At the end of the video, Jenny was seen hugging the cake and smiling brightly with her eyes closed. Fans responded with comments like, "Everything is explained with just 'thirtyyyyyy'... So Jenny," "Already looking forward to Jenny in her 30s," "Jenny is cuter than the cake," and "She even makes age her own style."

On January 15, 2024, Jenny posted a short-form video on SNS to commemorate her birthday. In the video, Jenny appeared holding a birthday cake, wearing sunglasses and a character headband, surrounded by acquaintances. The video included a scene where Jenny held a long birthday candle in her mouth and lit it with a torch. After placing the lit candle on the cake, she blew it out with her breath. This is one of the popular birthday celebration performances on SNS.

However, some netizens expressed discomfort by mentioning Jenny's past indoor smoking controversy. Comments included, "Given the previous controversy, she should have been more careful," "Is there really a need to do a performance that invites criticism?" "As a fan, I'm worried about Jenny's image," and "Shouldn't she avoid actions that could cause another scandal?"

On the other hand, some responded, "Just see it as a trendy performance," and "It's not even a cigarette, so what's the problem?" In July 2024, Jenny was caught on camera smoking an e-cigarette indoors on Capri Island, Italy, and blowing smoke toward a staff member's face, which sparked controversy. At that time, Jenny's side admitted to indoor smoking and apologized directly to the staff. The agency issued an official apology stating, "We sincerely apologize to everyone who felt uncomfortable due to Jenny's actions," and added, "Jenny reflects on smoking indoors and the harm caused to the staff, and she will repay with a more mature and better image in the future."

Born in 1996, Jenny debuted with Black Pink in 2016 and also debuted as an actress in 2023. Marking the start of her 30s, Jenny continues to communicate with her fans in celebration of her birthday.