Fifth Harmony's Camila Cabello is officially 18 years old!

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The 5H singer celebrates her 18th today, March 3 and all of her friends and fans are sending her all the best birthday wishes.

Cabello performed for the last time as a minor on Sunday at Club Nokia in Los Angeles, which she noted on Twitter.

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Monday, the singer excitedly marked her last day as a 17-year-old on Twitter.

We rounded up some of the best birthday wishes she has received so far on social media.

Cabello is really good friends with Internet sensation Anthony Quintal who is better known as Lohanthony. He left her a sweet birthday message on Instagram.

A photo posted by @lohanthony on Mar 2, 2015 at 9:00pm PST

"[H]appy birthday to one of the kindest souls [I] know," he beamed, adding, "[Y]ou're officially 18 now and you know what that means! [Y]ou can legally VOTE! [J]ust another form of contribution for you to make this nation an even better place! [E]veryday without even knowing it you continue to do such by spreading laughs caused by your sense of humor which more people should understand, your admirable self confidence, your bold beliefs in feminism and over all equality for all, and so much more that [I]'m hesitating to state because [I] don't want this post to be a [D]r[.] [P]hil episode".

Lohanthony continued his sweet birthday message to the newly 18-year-old 5H singer and concluded with, "[K]eep on shinin bright chica, here's to another year of just you being you".

Cabello was quick to thank Lohanthony for his thoughtful and sweet birthday message, claiming, it "is the NICEST thing".

Cabello also received birthday love from one of The Reflection Tour opening acts, Jacob Whitesides.

Cabello received some birthday love from MTV's Faking It too. The Twitter account for the show made a reference to the song her and the other 5H girls performed during an episode.

Harmonizers also sent some loving messages her way as she celebrates 18 years of life.

One fan thanked Cabello "for being a feminist role model".

Another fan commented on how Cabello's smile "lights up" others' lives and how her personality is admirable.

Cabello's mom also shared a sweet message via Twitter.

"To the most Kind. Genuine. Smart. Loyal. Passionate & loving person I know HAPPY 18!!" she gushed while sharing a baby photo of her daughter.

The Reflection Tour continues tomorrow, March 4, in Dallas where Cabello's birthday festivities are bound to continue.