Facebook CEO Mark Zuckerberg has just been labeled by singer Avril Lavigne as a bully. The 32-year-old “Complicated” hitmaker did not like how Zuckerberg used her ex-husband’s band in a new advertisement for the entrepreneur and computer programmer’s faux artificial intelligence project, called Jarvis.

The Verge has learned that after the release of the promotional clip, Lavigne took to Twitter to share a message she wrote using Apple’s Notes app. In the note, Lavigne called out Zuckerberg for taking a jab at Nickelback. According to her, although the Facebook inventor was allowed to have his musical opinion, the joke that he did to the rock band was done in “poor taste.”

“When you have a voice like yours, you may want to consider being more responsible with promoting bullying, especially given what’s going on in the world today,” Lavigne wrote. The singer-songwriter also emphasized her disgust for Zuckerberg’s deed by using the following hashtags: “#SayNoToBullying,” “#TheJokeIsOld” and “NickebackHasSoldOver50MillionAlbums.”

The “Sk8er Boi” singer used to be the wife of Nickeback’s lead singer Chad Kroeger, so the ad could have made a huge impact on Lavigne. Gizmodo reports that in the ad, Zuckerberg asks Jarvis if he could play good songs from Nickelback. However, the AI responds to the CEO that “there are no good Nickelback songs.”

If Zuckerberg’s joke caused Lavigne to lash out at him and to accuse him of bullying, then it’s not that hard to imagine what Lavigne’s reaction was to the news late last month about Canadian police’s threat to drunk drivers. Consequence of Sound revealed at the time that the Kensington Police have decided to punish those arrested for DUI by making them listen to Nickelback’s third album, “Silver Side Up,” on their way to jail.