Since reality-show stars these days are social-media pros, it is no surprise to see both girls tweeting a picture with Atkins before the event. Magrane tweeted on Monday that it was "fun times."

But someone else was excited to see Atkins: Sen. Rob PortmanRobert (Rob) Jones PortmanFlake's anti-Trump speech will make a lot of noise, but not much sense Top GOP candidate drops out of Ohio Senate race Overnight Tech: Regulators to look at trading in bitcoin futures | Computer chip flaws present new security problem | Zuckerberg vows to improve Facebook in 2018 MORE (R-Ohio) tweeted a picture behind the scenes with the "If You're Going Through Hell" singer on Sunday night.

Other previous "Idol" contestants expected to perform at the GOP convention include Danny Gokey, Taylor Hicks and Ayla Brown.