The two chatted about everything from who he thinks she chose on this season of "The Bachelorette," to what it's like being newly engaged, to her very dramatic breakup with last season's "Bachelor" star Arie Luyendyk Jr.
Kimmel then asked Becca what it was like for her to watch -- along with millions of Americans -- as Arie proposed and then un-proposed to her on national television.
"I watched it backstage during 'After the Final Rose' right before I had to see him," she explained. "So there was a lot of tears, a lot of snot running down my face. I'm sorry everyone had to see that."
"No, no, we enjoyed it," Kimmel replied before playing back the scene in which Arie tells Becca he's interested in perusing a relationship with now-fiancée Lauren Burnham.
"I feel like there was a moment where -- in the middle of the shock and misery -- you realized, 'Oh, I'll probably be 'The Bachelorette!'" Kimmel joked. Becca laughed but said that thought did not enter her head until about a month after the public embarrassment.
Becca also said she did not keep the ring Arie gave her. "Good riddance!" she exclaimed. She also said he makes an appearance on this season of "The Bachelorette," where she "did tell him to get out" -- and he finally listened.
Kimmel also asked Becca why she wasn't wearing an engagement ring, to which she replied, "Can't give the guy away; can't give the ring away." She did, however, assure Kimmel that she's "very certain" with her decision this time around.
"The Bachelorette" airs Monday nights at 8 p.m. on ABC.