Pandora is gaining ground for a 6th straight day

• Pandora shares are spiking Tuesday, continuing big gains over the last 6 days.
• The music streaming company is scheduled to report earnings Wednesday after the closing bell.
• The stock is down considerably over the last year, but investors are confident ahead of earnings.

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Pandora is rallying Tuesday ahead of its Wednesday earnings report. The stock is up more than 4% Tuesday, a continuation of gains for six straight days. Shares are up more than 14% over the last week.

The music streaming service reports fourth-quarter and fiscal year 2017 earnings Wednesday after the closing bell. Wall Street expects the company to make $375 million in revenue for the fourth-quarter, and earnings per share of -$0.28. Revenue of $375 million would be higher than the fourth quarter of 2016, when Pandora posted revenue of just above $313 million, although it only lost $0.13 per share in that quarter.

And while one of the latest checks on the user growth battle between Pandora and Spotify shows that Spotify has Pandora beat , investors are confident about Pandora recently. Although Pandora shares are down 59% over the last year, the stock has shot up in the last week ahead of earnings.

Follow Pandora's stock price live here.