Jessie J and Lady Gaga both have birthdays this week! Jessie J rounds out another year on March 27 and Mother Monster celebrates her next 365 days on March 28. It's likely that both ladies will celebrate their birthdays this weekend, so whose birthday party would you rather go to?

Jessie J is buddies with Ellie Goulding so she would probably make an appearance at her big bash. We also know that Jessie J likes to eat and cook, so you know the food would be out of the world! But seriously, how could you not want to party with someone who shaves their head?

Lady Gaga's soiree, on the other hand, would probably read as a who's who of the entertainment industry. Terry Richardson would be snapping pictures, good buddy Elton John would surely make an appearance and her boo Taylor Kinney would for sure be there too. We bet Gaga's mannequin with pick pubes would probably rear its ugly head... or crotch. Also, beware of Madonna trying to crash the party!

So which is it? Vote below.