In a subtle way, Kate Upton pregnant rumors have again surfaced. Last Monday, the Sports Illustrated model opted to take on the ice bucket challenge with her boyfriend, Justin Verlander.

In the Instagram video, the blonde beauty donned a white hoodie and a pair of black yoga pants. Verlander assisted her by dumping the ice water on her. The 22-year-old then tagged her "The Other Woman" co-stars Cameron Diaz and Leslie Mann. As the current ambassadress of Bobbi Brown, Upton also tagged the renowned makeup artist.

"What better way to create awareness than have a bunch of celebrities do something stupid?" said the Detroits Tiger pitcher.

More and more celebrities are accepting the Ice Bucket Challenge in an attempt to draw awareness to those battling with Amyotrophic Lateral Sclerosis (ALS). The ALS Association has received nearly $23 million in donations.

Kate Upton pregnant speculations have risen when some fans noted that Upton again donned loose-fitting clothes instead of a fitted tank top or a bikini like what Cody Simpson's ex Gigi Hadid did in her Ice Bucket Challenge video.

The couple, however, remains tight-lipped about the baby bump allegations. Perhaps the "Tower Heist" actress was merely careful not to show off her curves in social media especially when she blamed it as the reason for her reluctance to pose nude.

"But with social media and the Internet and not so great blogs and the attention like that, I don't think that my pictures would be received in the way that I'd want them to be received," she told Details magazine.

She added that social media made her more vulnerable in exposing herself: "That's why I've stayed away from them. I really appreciate those photos and I think those women are beautiful, but I think social media and the Internet has prevented me from putting myself out there like that."