Rihanna-Ciara Twitter beef: What happened between two Grammy winners?

It's been over a decade since Rihanna and Ciara's epic Twitter beef that's certainly hard to forget. While all seems amicable between the two Grammy winners now, a previous Twitter beef where the two threw jabs at each other sent fans into a frenzy.
Rihanna and Ciara Twitter beef
This famous beef between the two started with Ciara's appearance at the E! As a guest judge on Fashion Police 2011. Ciara shared her thoughts on Rihanna talking about how they ran into each other at a party but the latter wasn't the nicest. Ciara says she has always loved and respected the work singer and this was all crazy. Shortly after the show aired, Rihanna tweeted, 'My bad ci, did I get to tip you? #howrudeofme'. This fueled the beef between the two Grammy winners. Ciara, in turn, threatened the singer that she did not want to see him on stage or off. Rihanna then sarcastically wished her luck booking the stage she's speaking on.
However the two soon apologized to each other and Rihanna admitted that she was hurt and apologized for her mistake. The pair were rekindled a few years later when Rihanna and a friend posted a video clip of them watching and laughing at Ciara's newly released single Body Party. Ciara commented that she didn't understand what was going on because she thought they had moved on after the fight. Later, the Grammy winners ended their feud in 2018 after Ciara wished Rihanna on her birthday. A few months later Rihanna uploaded a video clip of her singing along to Ciara's song Goodies.