Scott Weiland strikes again.

It's safe to say that these past few weeks have not been the smoothest for the former Stone Temple Pilots frontman. Upon taking the stage in Corpus Christi, Texas, this week with his new band the Wildabouts, Weiland treated the audience to a cringe-worthy performance of the STP hit "Vasoline," complete with mumbled lyrics and off-key singing. For someone whose stage presence is often characterized as colorful and unpredictable, the three-minute-long cover was especially bizarre, prompting speculation of possible substance-abuse difficulties.

Scott Weiland Premieres New Songs at Sundance

This incident is coming on the heels of a series of less-than-flattering fan interactions, including a post-concert meet-and-greet in Boston at which he presented his admirers with outright disrespect. One fan even claimed that his request for a photo with Weiland was met with an impatient "let's get this shit done with."

Despite a vocal performance reminiscent of the type of intoxicated late-night karaoke that signals it's time to go home, Weiland's band remains on point throughout. Watch below: